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Re: A-833 overdrive won't shift 543 stroker
[Re: Evil Spirit]
#1379127
01/31/13 04:52 AM
01/31/13 04:52 AM
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Joined: May 2003
Posts: 6,558
Downtown Roebuck Ont
Twostick
Still wishing...
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Still wishing...
Joined: May 2003
Posts: 6,558
Downtown Roebuck Ont
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Quote:
The issue may be worn parts, but consider this - the O/D trans drops the engine RPM around 1000 more on the 1-2 shift than a Hemi box. That means the syncros/blockers have to slow the countershaft, input shaft, and now 2 clutch discs that much more to match the output shafts speed to make the 1-2 shift. I would think the extra load on the syncros and blocker rings would result in both a slower shift and more wear and tear on the parts. 
Those things were a pain to shift fast even when they were new.
The only way we could get the one in my buddy's 76 R/T to shift was to adjust the clutch so it had barely any free play. This gave the clutch maximum disengagement so the synchro could do its thing. The trans didn't crash, it just flat would not go past neutral on a power shift and it would hang just shifting fast if you didn't smash the clutch right into the rug.
Are you running 90wt or ATF in it? I would try ATF if it doesn't already have it in there. Also don't use synthetic oil in it. Synchros need metal to metal contact to work and there is nothing better than synthetic oil to prevent this.
Kevin
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Re: A-833 overdrive won't shift 543 stroker
[Re: radar]
#1379130
01/31/13 12:27 PM
01/31/13 12:27 PM
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Joined: Aug 2003
Posts: 12,291
Kent, Wa
340SHORTY
Truck Nut
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Truck Nut
Joined: Aug 2003
Posts: 12,291
Kent, Wa
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No problems here. I can speed shift my OD833 just as fast as any other 4 speed. What condition is your shifter in? Im changing mine from the factory 1 to a barely used Comp Plus I recently picked up. 
I am truckless..
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Re: A-833 overdrive won't shift 543 stroker
[Re: radar]
#1379132
01/31/13 12:37 PM
01/31/13 12:37 PM
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Joined: Apr 2012
Posts: 37
Minnesota
Shawnb
OP
member
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OP
member
Joined: Apr 2012
Posts: 37
Minnesota
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First thanks for the help trying to figure out a solution. To answer your questions I think it has 80w90 in it. I dont think the problem is worn parts in the overdrive. One of my 2 transmissions is new rebuilt and all new parts, the other is uesd. It has the same problem with both. With each unit removed the syncros look good. To evil spirit, ive been told by a local guy the exact thing you stated. The trans drops the engine down 1000 more RPM on the overdrive A833 and the syncros have to slow the input shaft that much more. To add to that now I have to slow 2 clutch discs rather than 1. I will do a lot of freeway driving and I like the fact I can do that now @ 2800 rpm. One response asked what the problem is. Its after 1st gear @ 5500 rpm I depress the clutch all the way to shift and the shifter will not pull down to 2nd. If I wait and wait and keep pulling it will a go into 2nd few seconds later. That does me no good in a street race though. I was told that I need closer ratios than I have in 1-2-3 and this wont happen. Is that true? And if so how do I do that?
Thanks
Last edited by Shawnb; 02/03/13 02:44 AM.
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Re: A-833 overdrive won't shift 543 stroker
[Re: Shawnb]
#1379133
01/31/13 12:44 PM
01/31/13 12:44 PM
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Joined: Jan 2003
Posts: 74,942
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 74,942
U.S.S.A.
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Quote:
First thanks for the help trying to figure out a solution. To answer your questions I think it has 80w90 in it. I dont think the problem is worn parts in the overdrive. One of my 2 transmissions is new rebuilt and all new parts, the other is uesd. It has the same problem with both. With each unit removed the syncros look good. To evil spirit, ive been told by a local guy the exact thing you stated. The trans drops the engine down 1000 more RPM on the overdrive A833 and the syncros have to slow the input shaft that much more. To add to that now I have to slow 2 clutch discs rather than 1. To rapidfire64 you said put your 18 spline Hemi 4 speed back in and "change the D60 to 3.54"?????? You mean change a gear? Can I do that? I do have 29" rear tires. I will do a lot of freeway driving and I like the fact I can do that now @ 2800 rpm. One response asked what the problem is. Its after 1st gear @ 5500 rpm I depress the clutch all the way to shift and the shifter will not pull down to 2nd. If I wait and wait and keep pulling it will a go into 2nd few seconds later. That does me no good in a street race though. I was told that I need closer ratios than I have in 1-2-3 and this wont happen. Is that true? And if so how do I do that?
Thanks
Passon sells an OD gear set with gear splits like a 727, but it's an 18 spline input shaft and about $2k. Is your OD in an alum case ?
you are asking a lot from that OD trans , I'm surprised it hasn't scattered yet.
Street racing 
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Re: A-833 overdrive won't shift 543 stroker
[Re: JohnRR]
#1379135
01/31/13 01:03 PM
01/31/13 01:03 PM
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Joined: Apr 2012
Posts: 37
Minnesota
Shawnb
OP
member
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OP
member
Joined: Apr 2012
Posts: 37
Minnesota
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Im a bit surprised it didnt explode yet too. The M/T street slick tires bite too. We ponuded te hell out of it last summer. Enough to ruine the 1st clutch set. That overdrive is stronger than you would think. $2k is just for the Hemi 4 speed gear set? Could the problem be with the fluid or adjustment? Is there anything I can try with the set up I have now?
Last edited by Shawnb; 01/31/13 02:05 PM.
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Re: A-833 overdrive won't shift 543 stroker
[Re: JohnRR]
#1379140
01/31/13 02:04 PM
01/31/13 02:04 PM
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Joined: Jun 2011
Posts: 511
AZ.
696pack
mopar
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mopar
Joined: Jun 2011
Posts: 511
AZ.
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Quote:
Quote:
First thanks for the help trying to figure out a solution. To answer your questions I think it has 80w90 in it. I dont think the problem is worn parts in the overdrive. One of my 2 transmissions is new rebuilt and all new parts, the other is uesd. It has the same problem with both. With each unit removed the syncros look good. To evil spirit, ive been told by a local guy the exact thing you stated. The trans drops the engine down 1000 more RPM on the overdrive A833 and the syncros have to slow the input shaft that much more. To add to that now I have to slow 2 clutch discs rather than 1. To rapidfire64 you said put your 18 spline Hemi 4 speed back in and "change the D60 to 3.54"?????? You mean change a gear? Can I do that? I do have 29" rear tires. I will do a lot of freeway driving and I like the fact I can do that now @ 2800 rpm. One response asked what the problem is. Its after 1st gear @ 5500 rpm I depress the clutch all the way to shift and the shifter will not pull down to 2nd. If I wait and wait and keep pulling it will a go into 2nd few seconds later. That does me no good in a street race though. I was told that I need closer ratios than I have in 1-2-3 and this wont happen. Is that true? And if so how do I do that?
Thanks
Passon sells an OD gear set with gear splits like a 727, but it's an 18 spline input shaft and about $2k. Is your OD in an alum case ?
you are asking a lot from that OD trans , I'm surprised it hasn't scattered yet.
Street racing
John is correct. The old Chrysler 4 speed ODs were not intended to be a racer's trans they were built for people that wanted better mileage. It is NOT the trans you want behind a big cube engine that you are trying to bang gears in. It is just a matter of short time before you scatter it.
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Re: A-833 overdrive won't shift 543 stroker
[Re: 696pack]
#1379141
01/31/13 03:44 PM
01/31/13 03:44 PM
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Joined: Dec 2004
Posts: 2,363
Wheatfield, NY
Cuda340
top fuel
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top fuel
Joined: Dec 2004
Posts: 2,363
Wheatfield, NY
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just a thought. Try and adjust the pressure plate to disengage the clutch discs more. The maybe still grabbing enough to keep the input spinning. You need at least .060 or so to keep things happy, use a feeler gauge between the disc or in your case discs to see how much clearence you have. But as others have said that OD is on borrowed time. With 29" tires 4:10s and the 18-spline 55mph should be around 3300RPM.... Put the 3:54s in it that thing has a TON of torque!!!!! You wont need the OD then... Good luck  I want to add also make absolutely sure the gear oil in the trans is GL-4 rated not the newer GL-5 Stuff!!!! Gl-5 rated has too many friction modifiers in it and it doesnt let the synrco grab the gear effectively causing lazy shifts and grinding. ATF may work for you too as others have used it but I am sticking with my guns of GL-4 rated 80-90wt. It may be tougher to find the Gl-4 stuff but it is out there still...
Last edited by Cuda340; 01/31/13 03:48 PM.
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Re: A-833 overdrive won't shift 543 stroker
[Re: Shawnb]
#1379142
01/31/13 04:53 PM
01/31/13 04:53 PM
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Joined: Aug 2003
Posts: 43,097
Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,097
Bend,OR USA
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Mopar had a lot of complaints on the shifting of the stock NP833 when they first came out way back when, change the fluid and run straight Type F ATF, non synthetic Call Mcleod and ask them how much clearance(free play) you should have between the clutch discs and the flywheel, floaters,with a feeler gauge, set that clearnce up and see if it shifts better
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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