Re: 727 woes
[Re: dcr]
#1044137
07/31/11 07:43 PM
07/31/11 07:43 PM
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Joined: Aug 2003
Posts: 43,124
Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,124
Bend,OR USA
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Check the shifter adjsutment again, make sure it(the cable end) drops into the shift arm easily in 1st,2nd, and 3rd gear  I had the same sounding problem two weeks ago when I installed a new trans. blanket, the blanket was limiting the shifter arm and it ended up not shifting properly, I ended up adjusting it the wrong way once and it would not go into 2nd or high gear at all  , I ended up loosening and rerouting the blanket away for the shiter arm on the valve body and readjusted the shift cable end so it drop into 1st, 2nd and high gear and it works fine now  Two races(15+ runs) so far with flawless results 
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: 727 woes
[Re: dcr]
#1044138
07/31/11 08:52 PM
07/31/11 08:52 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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I would look at the pump drive lugs... might be sheared off with enough friction to just turn the pump without any heavy load 
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Re: 727 woes
[Re: MR_P_BODY]
#1044139
07/31/11 09:11 PM
07/31/11 09:11 PM
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Joined: Aug 2003
Posts: 2,401
Tucson, Arizona
MRMOPAR
top fuel
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top fuel
Joined: Aug 2003
Posts: 2,401
Tucson, Arizona
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Based on first hand experience with this  with MR_P_BODY
68 RR 528" INDY MAXX
07 2500 CTD
Southwest International Raceway - IHRA - Tucson, AZ
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Re: 727 woes
[Re: dcr]
#1044143
08/01/11 12:54 PM
08/01/11 12:54 PM
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Joined: Jan 2003
Posts: 74,976
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 74,976
U.S.S.A.
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Quote:
Thank you for the pointers Ill check them out would it be possiable for flex plate to deflect enough to cause that problem or maybe shim converter back some it is a sfi plate but I did not measure how far I had to pull converter forward to attach to plate but it did not seem excessive.
Highly doubtful this is the issue .
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Re: 727 woes
[Re: JohnRR]
#1044144
08/01/11 01:17 PM
08/01/11 01:17 PM
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Joined: Apr 2009
Posts: 117
Muskegon Mi
dcr
OP
member
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OP
member
Joined: Apr 2009
Posts: 117
Muskegon Mi
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Quote:
Quote:
Thank you for the pointers Ill check them out would it be possiable for flex plate to deflect enough to cause that problem or maybe shim converter back some it is a sfi plate but I did not measure how far I had to pull converter forward to attach to plate but it did not seem excessive.
Highly doubtful this is the issue .
Im sure there is damage just trying to figure out what may have caused it so i dont have a repeat.
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Re: 727 woes
[Re: dcr]
#1044145
08/01/11 01:35 PM
08/01/11 01:35 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Quote:
Quote:
Thank you for the pointers Ill check them out would it be possiable for flex plate to deflect enough to cause that problem or maybe shim converter back some it is a sfi plate but I did not measure how far I had to pull converter forward to attach to plate but it did not seem excessive.
Highly doubtful this is the issue .
Im sure there is damage just trying to figure out what may have caused it so i dont have a repeat.
The only thing I can think of in the aspect of the
converter is if you have a mid plate on the engine
and the converter mounting points werent made longer
for the mid plate... with a mid plate it pushes the
trans back and the converter is still in the stock
location in relationship to the crank/flex plate...
I have a .090 steel mid plate and never had any issues
with the stock location... granted its .090 less
engagement into the pump
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Re: 727 woes
[Re: Leigh]
#1044147
08/01/11 10:45 PM
08/01/11 10:45 PM
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Joined: Apr 2009
Posts: 117
Muskegon Mi
dcr
OP
member
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OP
member
Joined: Apr 2009
Posts: 117
Muskegon Mi
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Quote:
Since you made one clean pass. converter lug failure is iffy, although possible. You didn't say if revearse worked. If it did, look for rear (forward for the GM folks) clutch failure, or, front planet failure.
Made several clean passes before failure and yes does work but also fails the same as the forward gears.
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Re: 727 woes
[Re: dcr]
#1044150
08/03/11 11:08 AM
08/03/11 11:08 AM
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Joined: Jan 2003
Posts: 995
Boynton Beach, Fl
Rapid588
super stock
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super stock
Joined: Jan 2003
Posts: 995
Boynton Beach, Fl
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Does sound like possible front pump gear lug failure.... One thing a lot of people neglect to do on a new converter and/or pump gear replacement is to take the pump gear with the lugs on it (just the inner gear part) and set it on your converter, indexing it like it was installed. Then take a feeler gauge and see if you have ANY clearance between either of the lugs and the converter indexing slots as you put pressure by turning the gear clockwise (converter snout facing up)like when engine is running. If there is ANY clearance, then you have a high chance of having a pump drive gear that will shear the one lug off that is taking 100% (all) of the load.... and then takes off the other one to complete the failure. I have seen plenty of mismathes.... could be either the converter snout (index) or the pump gear. Most (not all) of the stock gears have an undercut on the lug drive tangs..... you can get the better non undercut and beefier units thru the aftermarket .... good insurance to have (still check the indexing tho ) CRT heavy duty pump gear here ----> https://www.coperacingtrans.com/product_...813251b82ea2bd7Randy
93 Dodge Stealth - Supercharged 526ci Hemi
93 Dodge Daytona Top Sportsman injected 588 Hemi - plus a lil NOS
67 Hemi GTX (may the 4speed with you!)
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Just got back from mo power event at martin brand new car and engine this weekend worked very well all in all ran number off trailer was blessed with a red light first round thinking cool free time trial cut good light took off shifted 2nd right at proper shift point but slipped for about 700 prm before it hooked eased out of it shifted to 3rd and lost every thing coasted off track to ticket booth still no gears let car set a couple mins started and took off seemed fine hit second nothing,coasted some more not quite enough to make it back to pit spot ,refired worked again got it to trailer checked fluid good,checked shift cable adjustment good went to back up seems as soon as I eased of throttle lost all drive. I was able to drive it on trailer and off trailer into garage when I got home any ideas dont really know were to start Im thinking converter or pump what do you think?
Just a guess.
