What is going on with my transmission mount
#505105
10/24/09 12:21 AM
10/24/09 12:21 AM
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Posts: 4,481
Mesa, AZ
Pat_Whalen
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super gas
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super gas
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Mesa, AZ
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I know this is like the millionth question I've posted in a couple of days, but I promise, I'll stop soon. 1980 RC, 440 engine with short tailshaft 727. This is currently the conglomeration that is my transmission mount:  It is my understanding, via the original owner, that he "thinks" this isn't the way it's supposed to be...  But I also notice that the tailshaft does not have the conventional 727 through-style mount. Almost looks like that first plate on the top is bolted into the housing. My question would be, is there an appropriate mount for this trans for my application? Or am I going to be fabbing something together to make it hold. I should be able to just bolt the last piece of steel (on the bottom) to the trans, correct? I mean, it's got rubber isolators, so it should be fine. ? Thanks all. Cheers 
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Re: What is going on with my transmission mount
[Re: buildanother]
#505107
10/24/09 09:55 AM
10/24/09 09:55 AM
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Mesa, AZ
Pat_Whalen
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super gas
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Quote:
That's a wild setup. I've only had 4x4's, and they had that beefy steel plate with the big rubber donuts like you got there. I've not been keeping track, are you converting a 4x4 into 4x2?
Negative. This is simply how I got the truck. Going with a divorced np205. I almost don't wonder if the underside of the trans tailshaft has two holes in it that may line up with the beefier, older looking bottom plate. I've never seen one of these mounted in such a way though, I've always seen through "through" hole mounted 727.
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Re: What is going on with my transmission mount
[Re: John_Kunkel]
#505109
10/25/09 05:59 PM
10/25/09 05:59 PM
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Joined: May 2003
Posts: 15,487
Florida
scratchnfotraction
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if going with a devorced t-case I would swap a 2x4 xmember in there with that short 727 and use a stock 2x4 tranz mount then a short jack shaft to connect to the xfer you have a 4x4 xmember with part of the 4x4 mount,not sure what the rest is.. the xmember drops way down like that and has the 2 big rubber disc for the mounts WHATS missing is the married xfer and the adaptor plate the hooks the 2 together,it has a "stand" that has the mount built in with it to mount on that xmember then you would be able to remove the 7 bolts and kick the xfer off the end of the tranny for service with out removing the rest of the tranz or xmember on mine,I would also R&R the xfer,then R&R the trans and xmember seperate...same with going back in,install the tranz then hang the xfer and swing it over to line up the 7 bolts for it IMO,dont get under it when its loose and hanging,its very heavy..LOL get a little better pic of the whole rear of tranz for study...snap one of the tail shaft where the 2 bolts for the mount are measure from the main case to the center of the tranz mount..should be 7",if its 5" the xmember has to be moverd forward...which is not good we will talk about makeing a new xmember out of 2" square stock and a couple stock braces from a 2x4 truck on you next post  is the xfer in there and hung?? do you know if that short 727 is from a RV/motor home?? 
Last edited by scratchnfotraction; 10/25/09 06:01 PM.
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Re: What is going on with my transmission mount
[Re: scratchnfotraction]
#505110
10/25/09 07:52 PM
10/25/09 07:52 PM
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Joined: Aug 2003
Posts: 4,481
Mesa, AZ
Pat_Whalen
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super gas
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super gas
Joined: Aug 2003
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Oh boy, where to start.... Quote:
if going with a devorced t-case
I am...
Quote:
I would swap a 2x4 xmember in there with that short 727 and use a stock 2x4 tranz mount
That hadn't crossed my mind. Would be at all possible to use the 4x4 member and fab a mount from it to the current short tailshaft 2wd 727?
Quote:
then a short jack shaft to connect to the xfer
Most likely will have to get one made when it's all said and done. Don't have the original and can't find one...
Quote:
you have a 4x4 xmember with part of the 4x4 mount,not sure what the rest is..
Me neither...
Quote:
the xmember drops way down like that and has the 2 big rubber disc for the mounts
WHATS missing is the married xfer and the adaptor plate the hooks the 2 together,it has a "stand" that has the mount built in with it to mount on that xmember
then you would be able to remove the 7 bolts and kick the xfer off the end of the tranny for service with out removing the rest of the tranz or xmember
on mine,I would also R&R the xfer,then R&R the trans and xmember seperate...same with going back in,install the tranz then hang the xfer and swing it over to line up the 7 bolts for it
IMO,dont get under it when its loose and hanging,its very heavy..LOL
get a little better pic of the whole rear of tranz for study...snap one of the tail shaft where the 2 bolts for the mount are
measure from the main case to the center of the tranz mount..should be 7",if its 5" the xmember has to be moverd forward...which is not good
we will talk about makeing a new xmember out of 2" square stock and a couple stock braces from a 2x4 truck on you next post
I'd honestly feel more comfortable fabbing a crossmember for the trans if this isn't the right one and I can't find one.
Quote:
is the xfer in there and hung??
Negative. I'm also lacking the crossmember for the divorced 205. This truck was originally 360/727/208. The original owner said he bought the 440 and trans from some guy, and the divorced tcase at a later date. I've already started on the design of a xmember for the t-case.
Quote:
do you know if that short 727 is from a RV/motor home??
I actually believe it is. I'll be contacting the seller because he wasn't very descriptive about where the trans/engine came from. Is there any numbers on either that I could run to determine where it came from? Would a 727 out of an RV/motor home be different than a truck?
Quote:
I wish...
Last edited by Pat_Whalen; 10/25/09 08:53 PM.
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Re: What is going on with my transmission mount
[Re: Pat_Whalen]
#505111
10/25/09 10:10 PM
10/25/09 10:10 PM
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Joined: May 2003
Posts: 15,487
Florida
scratchnfotraction
I Live Here
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I Live Here
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yes,the rv/MH tranz mount can be diff on the tail shaft.. my 79/MH 440/727 short shaft had the mount 5" from the case to the center of the mount most truck and 2x 727 have it at 7" from case to center of mount.. I guess you could fab something up to use that xmember..IMO,I would not use it..it hangs low and limets ground clearnce.. a pic of the xmember I made up is on the post "more of scratchins 440 truck progress,posted by dodgeram440,on the truck board..take a looky see at it.. that would be simple to do and work out great in your truck as well with the 2x tranz configuration that xfer is another story on mounting,it needs to have some thought put in to it as it needs to hang and have some support from fo and aft movement..not hard,just needs to be stiff/solid
Last edited by scratchnfotraction; 10/25/09 10:12 PM.
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Re: What is going on with my transmission mount
[Re: Pat_Whalen]
#505114
10/26/09 03:19 PM
10/26/09 03:19 PM
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Joined: May 2003
Posts: 15,487
Florida
scratchnfotraction
I Live Here
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I Live Here
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no the xmember changed in 88 IIRC you want a least one from an 81 to 85,IMO the one I fabed up for mine works good.. I will work on a pic for you.. did you measure from back of case where the tail housing bolts to the center of the tranz mount?? check it to make sure its 7",if so a stock mid 80s xmember is good to go.. I have a stock one if you want to pay the shipping.. 
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Re: What is going on with my transmission mount
[Re: scratchnfotraction]
#505115
10/26/09 03:41 PM
10/26/09 03:41 PM
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Joined: Aug 2003
Posts: 4,481
Mesa, AZ
Pat_Whalen
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super gas
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OP
super gas
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Mesa, AZ
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Quote:
no the xmember changed in 88 IIRC
you want a least one from an 81 to 85,IMO
the one I fabed up for mine works good..
I will work on a pic for you..
did you measure from back of case where the tail housing bolts to the center of the tranz mount??
check it to make sure its 7",if so a stock mid 80s xmember is good to go..
I have a stock one if you want to pay the shipping..
Are you talking about taking the measurement on the trans itself and only the trans? So where the tailshaft housing bolts to the main case to the trans mount on the tailshaft? Or are you talking about from the main case to the trans mount in the crossmember. Because the engine is out and I'm pretty sure the transmission is not currently located in it's correct spot, judging by the fact that when the engine was mounted to it, the engine mounts were torqued all sorts of crazy and the engine was touching the firewall.
I'll have to keep that in mind about the crossmember. So when I call salvage yards, I'm looking for a pre-85, possibly pre-88 2wd that had an automatic trans. Shouldn't be too hard to find.... 
I would take you up on the offer if you weren't 2000+ miles away 
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Re: What is going on with my transmission mount
[Re: Pat_Whalen]
#505117
10/26/09 04:06 PM
10/26/09 04:06 PM
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Joined: May 2003
Posts: 15,487
Florida
scratchnfotraction
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I Live Here
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not pre- 81-85 is what I would look for,but again it being an 80 RC might want a 77-80 2x xmember,but they could be the same,been 15 yrs since I played 4x4,just going on memory right now.. I think those motor home mounts you have stick the engine to far back,they did when I tryed mine??? yes,from the back of case to where the mount bolts to the tranz tail housing..7" to the center of the bolt boss on the housing..
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Re: What is going on with my transmission mount
[Re: scratchnfotraction]
#505118
10/28/09 08:41 AM
10/28/09 08:41 AM
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Joined: Aug 2003
Posts: 4,481
Mesa, AZ
Pat_Whalen
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super gas
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OP
super gas
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Mesa, AZ
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Well, got a 2wd crossmember out of an 84.
Only thing I noticed was that my 4wd crossmember does not bolt the same at all. 4wd crossmember has two bolts on the lower part of the frame rail, about 5 inches apart- 2wd crossmember also has two bolts, but about 3.500" apart. 4wd crossmember has 3 bolts on the top rail- 2wd crossmember has 2 bolts, and they are not the same distance apart as any 2 out of the three from the 4wd member. Hope that wasn't too confusing.
There are, however, two holes in the frame about 1.500' further back that the mount would go into perfectly. Please tell me this isn't the correct location. I'm hoping when I remove the 4wd xmember that the bolt holes for the 2wd member will reveal themselves.
Also, I measured the 727. From the back of the main case to the bolt holes for mounting on the tailshaft is roughly 7".
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Re: What is going on with my transmission mount
[Re: Pat_Whalen]
#505119
10/28/09 10:27 AM
10/28/09 10:27 AM
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Joined: May 2003
Posts: 15,487
Florida
scratchnfotraction
I Live Here
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I Live Here
Joined: May 2003
Posts: 15,487
Florida
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if the tail shaft is 7" the 2x xmember shold fit may have to drill some holes,sounds like it may already have some drill,that sounds like a lot of holes let the tranz down mount the tranny mount and xmember then jack it up and see what holes if any line up..drill acordingly thats why I made mine out of the 2" square stock useing the lower brackets from a 2x member mine was further forward and missed the 2 front holes by 1/8" to 1/2" did you look on my 2nd progress post and take a look at the mount made out of 2" stock?? on the first progress post you can see where I made up anothe stock mount with flat plate to do it..just was to hight and close to fllor pan.. we will help get it in there one way or another  the post are by dodgeram440 and scratchins 440 truck progress post,they have been bumped back up to the top on the truck board..you should maybe check them out,IMO.. 85 gave me the idea with the square stock mount he made up for his,there is a pic of it there also 
Last edited by scratchnfotraction; 10/28/09 10:29 AM.
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Re: What is going on with my transmission mount
[Re: scratchnfotraction]
#505120
10/28/09 11:23 AM
10/28/09 11:23 AM
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Joined: Aug 2003
Posts: 4,481
Mesa, AZ
Pat_Whalen
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super gas
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OP
super gas
Joined: Aug 2003
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Mesa, AZ
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Quote:
if the tail shaft is 7" the 2x xmember shold fit
may have to drill some holes,sounds like it may already have some drill,that sounds like a lot of holes
let the tranz down mount the tranny mount and xmember then jack it up and see what holes if any line up..drill acordingly
Problem is, without the engine mounted in there, I've got know way of knowing really "where" it should be. I figured if the frame had some bolt holes in the proper locations, I could just use them and that way I could get a feel for where the transmission needed to be, which would then help me out with my other problem of proper engine mount brackets and locating where the engine should sit.
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Re: What is going on with my transmission mount
[Re: scratchnfotraction]
#505122
10/28/09 10:46 PM
10/28/09 10:46 PM
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Joined: Aug 2003
Posts: 4,481
Mesa, AZ
Pat_Whalen
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super gas
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super gas
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Snapped some pictures tonight of what I'm working with. Perhaps this will shed some light on the dilemma. Here is a rather poor picture of the 4wd crossmember that is currently installed.  Notice three bolts holding the xmember to the top of the framerail and two holding it to the bottom (with a potential third hole that does not have a bolt in it) Here is a picture of the 2wd crossmember I pulled out at the junkyard yesterday.   There is obviously a difference in bolt spacing from one to the other. Hopefully this weekend will hold the opportunity for me to remove the current 4wd crossmember and see if my frame has provisions for the 2wd xmember in that location. Do the pictures help any?
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