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Galant VR-4 Forums » Galant VR-4 » How To and Info Archive » Dsm trans preload specs (very useful info)
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Dsm trans preload specs (very useful info)


3rdstrikedsm
Now mandatory for Wendy's Chili to come with cheese


Galant VR-4 org Post #: 862594 posted 01/05/10 09:17 AM     Remind Me!  Send Private Message   Edit Post      
The following is for W5M33 AWD 5-speed DSM transmissions:

Ok, stock specs are:

The Preload Setting is listed in SAE (inches):

Input Shaft --> 0.000" - 0.002" ENDPLAY
Intermediate Shaft --> 0.003" - 0.005" PRELOAD
Center Differential --> 0.003" - 0.005" PRELOAD
Output Shaft --> 0.003" - 0.005" PRELOAD
Front Differential --> 0.002" - .0067" ENDPLAY

These are what I normally use:

Stock/Street Transmissions with less than 400TQ at the crank:

Input Shaft --> 0.004" - 0.007" PRELOAD
Intermediate Shaft --> 0.005" - 0.007" PRELOAD
Center Differential --> 0.005" - 0.007" PRELOAD
Output Shaft --> 0.003" - 0.005" PRELOAD
Front Differential --> 0.002" - .0067" ENDPLAY

Street/Strip Transmissions with less than 600TQ at the crank:

Input Shaft --> 0.005" - 0.007" PRELOAD
Intermediate Shaft --> 0.007" - 0.009" PRELOAD
Center Differential --> 0.005" - 0.007" PRELOAD
Output Shaft --> 0.003" - 0.005" PRELOAD
Front Differential --> 0.002" - .0067" ENDPLAY

All out RACE Transmissions that are Rebuilt/Inspected regularly with more than 600TQ at the crank:

Input Shaft --> 0.007" PRELOAD
Intermediate Shaft --> 0.008" - 0.010" PRELOAD
Center Differential --> 0.005" - 0.007" PRELOAD
Output Shaft --> 0.004" - 0.006" PRELOAD
Front Differential --> 0.002" - .0067" ENDPLAY

For Extremely HIGH HP/TQ transmissions (As in ~900-1000+TQ at the crank):

Input Shaft --> 0.007" PRELOAD
Intermediate Shaft --> 0.010" - 0.012" PRELOAD
Center Differential --> 0.005" - 0.007" PRELOAD
Output Shaft --> 0.004" - 0.006" PRELOAD
Front Differential --> 0.002" - .0067" ENDPLAY



These figures are normally what I use, unless a customer has a specific number they want to run for shims.

As well, each transmission rebuilder will shim differently, or not even reshim whatsoever (reusing stock shims). Most transmission rebuilders will not tell you these numbers whatsoever, as this is what makes their transmissions shift like butter with all the other mods that they do to the shift rails, hub and sliders, gears, linkage, etc.

I would recommend using a quality Micrometer that is accurate to 0.0001", and I normally do two or three seperate solder-tests per bearing race and then take the average of each test to see if there is anything out of the ordinary, and then I select the shim by adding the preload figure listed above to the solder average thickness, or subtract the endplay figure listed above from the solder average thickness.

If you need the part number for a shim, feel free to PM me, or reference a factory service manual for all the part numbers of shims for each transmission model.
__________________

I saw this on another forum and thought it could be very useful for diy guys, You don't run across this type of info every day!



1994 supra 6spd 612whp and more to come soon!
1995.5 Audi s6 Vi-pec powered!

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Street Surgeon
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Galant VR-4 org Post #: 862603 posted 01/05/10 11:03 AM     Remind Me!  Send Private Message   Edit Post      
Interesting read, who posted this if you don't mind my asking?



Cory O.
'92 Mitsubishi Galant VR-4 501/1000
Heavily modified, barely driven, some assembly required.

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red90awd
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Galant VR-4 org Post #: 862612 posted 01/05/10 11:31 AM     Remind Me!  Send Private Message   Edit Post      
These come right out of the transmission PDF found in the library Right?



Kensington

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3rdstrikedsm
Now mandatory for Wendy's Chili to come with cheese


Galant VR-4 org Post #: 862614 posted 01/05/10 11:42 AM     Remind Me!  Send Private Message   Edit Post      
No this is performance related preloads as well as stock^^



1994 supra 6spd 612whp and more to come soon!
1995.5 Audi s6 Vi-pec powered!

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red90awd
Junior Member
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Galant VR-4 org Post #: 862615 posted 01/05/10 11:43 AM     Remind Me!  Send Private Message   Edit Post      
Thats pretty cool that you are publishing something like this.



Kensington

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3rdstrikedsm
Now mandatory for Wendy's Chili to come with cheese


Galant VR-4 org Post #: 862616 posted 01/05/10 11:43 AM     Remind Me!  Send Private Message   Edit Post      
Quoting Street Surgeon:

Interesting read, who posted this if you don't mind my asking?



A guy named Tim from CO, This was on the dsmlink forums and I figured since not everyone has access to that forum I would share it here as well.



1994 supra 6spd 612whp and more to come soon!
1995.5 Audi s6 Vi-pec powered!

Posts: 3402 | From: 32159, FL | Member Since: 02/18/08 | IP: (70.225.160.245) | Report this post to a Moderator

turbowop
Hard Snarker
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Galant VR-4 org Post #: 862633 posted 01/05/10 12:56 PM     Remind Me!  Send Private Message   Edit Post      
Does this guy have any references to show that his specs shift well and/or are good for bearing life?



-Mark

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3rdstrikedsm
Now mandatory for Wendy's Chili to come with cheese


Galant VR-4 org Post #: 862680 posted 01/05/10 05:06 PM     Remind Me!  Send Private Message   Edit Post      
Seems to be a well respected member on link forums with lots of tech input.



1994 supra 6spd 612whp and more to come soon!
1995.5 Audi s6 Vi-pec powered!

Posts: 3402 | From: 32159, FL | Member Since: 02/18/08 | IP: (70.225.160.245) | Report this post to a Moderator

1qkfwd
Member
1868/2000


Galant VR-4 org Post #: 862681 posted 01/05/10 05:10 PM     Remind Me!  Send Private Message   Edit Post      
Not only is he on the link forums he's on dsmtuners. His screen name i believe is twicks69. I've chatted with him quite a few times he's a good guy. He has had tons of dyno time on his 2g and lots of trans rebuilds on other cars to.



92 eclipse FWD [email protected]
92 Talon AWD Best et [email protected] 1.39 60'
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donniekak
Member ++


Galant VR-4 org Post #: 862700 posted 01/05/10 06:48 PM     Remind Me!  Send Private Message   Edit Post      
Tim Zimmer. He does a lot of dsm transmissions, and broke many for a long time. Those are the preloads that about everyone uses. Good info for everyone to have.

Posts: 747 | From: surprise az | Member Since: 01/01/09 | IP: (76.125.190.243) | Report this post to a Moderator

curtis Galant VR4.org Moderator
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Galant VR-4 org Post #: 862725 posted 01/05/10 08:18 PM     Remind Me!  Send Private Message   Edit Post   
Steve..... put this in a How to for future reference for sure.



92 GVR4 0475/1000
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