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Re: Automatic Transmission questions for the experienced
[Re: dvw]
#2276876
03/27/17 12:03 AM
03/27/17 12:03 AM
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Joined: Sep 2007
Posts: 14,889 up yours
Supercuda
About to go away
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About to go away
Joined: Sep 2007
Posts: 14,889
up yours
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Easy to swap the lock-up into nonlock-up. Swap the input shaft, reaction support, valve body. Doug And torque converter
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
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Re: Automatic Transmission questions for the experienced
[Re: dogdays]
#2277242
03/27/17 04:41 PM
03/27/17 04:41 PM
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Joined: May 2008
Posts: 5,399 Aurora, Colorado
451Mopar
master
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master
Joined: May 2008
Posts: 5,399
Aurora, Colorado
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Needs to be pointed out here that Mopar transmissiions were built to9 the original engine's torque output. So a 318 trans is the weakest of all transmissions that would be built in that case. Transman should enlighten us how to get that trans to a higher torque level. It's similar with 904s with the 318 getting the 998 and the 360 getting the 999.
I became aware of this when I bought a "bulletproof" rebuilt motorhome transmission only to find out it was a 2-barrel 383 tranny dressed as the MH transmission. I didn't know about the ID numbers until later, to my chagrin.
R There really is not much difference in a 318 transmission and a 440 transmission. Most of the major changes were year specific. A few pieces that may be different are the 3 pinion or 4 pinion planetary, and a 3 or 4 or 5 clutch front drum and the number of springs in the drum. There may also be a different governor weight for different shift points, but the rest is pretty much the same. Some of the year changes would be if it has a rear pump, cable shift, cable park, early (pre-67) converter spline count, narrow or wide front drum bushing which also caused a change to the pump support. That just some of the '60-mid '70 changes before lockup converter, and the change in the spline pressure angles.
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Re: Automatic Transmission questions for the experienced
[Re: 451Mopar]
#2277635
03/28/17 12:09 PM
03/28/17 12:09 PM
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Joined: Jan 2003
Posts: 75,083 U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,083
U.S.S.A.
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What are the dark grey/green frictions? I think the High Energy version from borg warner? Bulk Part messed up an order and sent me them insted of the Alto Red clutches and I have never used them. How good are those?
Those are what I used in the hi torque Diesel builds when I was a DTT installer in the early 2000's
running up my post count some more .
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Re: Automatic Transmission questions for the experienced
[Re: sthemi]
#2277879
03/28/17 06:24 PM
03/28/17 06:24 PM
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Joined: Mar 2011
Posts: 3,089 Michigan
A727Tflite
master
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master
Joined: Mar 2011
Posts: 3,089
Michigan
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Doug captured most of it for the gasket and seal kit. If you buy the master kit with frictions and steel separator plates there are thickness differences from the early to later MY units - I forgot where the break was. If I recall correctly the early were thin then we went to thick on both the steels and frictions. The later design had greater heat capacity so they were less likely to potato chip from overheating. There were some design changes along the way regarding seals - primarily for wear resistance and cold weather operation and to prevent heat aging - the better kits, maybe all at this point have those improvements.
If you are positive no one has taken the trans apart and updated it or made a lockup out of a non or vice versa - then order the kit for your MY application. The later style feeds the rear clutch though the rear seal on the input shaft and a seal on the rear clutch piston support where the early units fed the rear clutch through the two seals on the input shaft. Many guys forget that large seal on the rear clutch piston support - you get a no drive condition and sometimes a drive/creep in neutral condition. All I can say for guys doing one is go slow - take pictures, match seal in the kit against where it lives in the trans before
throwing out the old ones. Nothing more disturbing than getting the trans done and find a seal left over without explanation. The correct year service manual is usually helpfulll too.
Last edited by Transman; 03/28/17 06:26 PM.
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