Duramax Diesels Forum Truck of the Week
  #1  
Old 01-03-2017, 06:04 PM
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Default Hard 3-4 shift.

I just built a transmission for a buddy and its great other than a pretty violent 3-4 shift under wot. I used raybestos GPZ torq packs in C1 through C4, MikeL/ratiotek shift, trim, and pump springs and a transgo shift kit along with a DPC triple disc. Did a relearn with a snapon solus pro when i built it and these are my clearances. Any help or criticism would be greatly appreciated 👍
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Old 01-03-2017, 06:16 PM
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Sure it's a 3-4 and not a converter lock?
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Old 01-03-2017, 06:32 PM
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Default Hard 3-4 shift.

Stock defuel in ecm tuning and stock tcm defuel tuning?

Has he tried a stock tune to see if it clears up?
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Old 01-03-2017, 07:35 PM
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Is this a 5 speed with the full transgo in it?
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Old 01-03-2017, 07:38 PM
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Quote:
Originally Posted by clrussell View Post
Sure it's a 3-4 and not a converter lock?
Fairly certain. Its pretty violent.
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Old 01-03-2017, 07:39 PM
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Quote:
Originally Posted by Chevy1925 View Post
Stock defuel in ecm tuning and stock tcm defuel tuning?

Has he tried a stock tune to see if it clears up?
As far as i know. Thats a good thought though. Definitely going to look into that as im not 100% sure who tuned the truck and i thought it shifted odd before i built it.
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Old 01-03-2017, 07:39 PM
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Quote:
Originally Posted by bmc1025 View Post
Is this a 5 speed with the full transgo in it?
Yessir.
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Old 01-03-2017, 07:44 PM
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It is likely tie up from using the full transgo along with the better clutch packs.
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Old 01-03-2017, 07:50 PM
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Quote:
Originally Posted by bmc1025 View Post
It is likely tie up from using the full transgo along with the better clutch packs.
Thats what another knowledge allison guy told me 😔 any options other than pulling the trans and undoing the internal mods?
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Old 01-03-2017, 07:57 PM
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Don't mistake me for a knowledgeable Allison guy, I only know enough to get into trouble.

I don't think there is any feasible way around it.
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Old 01-03-2017, 07:58 PM
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Glad I undid the transgo on the last 5 speed I did
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Old 01-03-2017, 08:03 PM
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Quote:
Originally Posted by Inline only View Post
Should a bought a Cummins
Yeah. That would be perfect. Then he could spend a couple grand on billet shafts and servo upgrades to hold the power a allison can hold with just upgraded clutches and a shift kit 🙂
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Old 01-03-2017, 08:22 PM
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We got him completely deleted. Sorry for not catching that one sooner, busted.
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Old 01-03-2017, 08:57 PM
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What year truck? The full transgo is nothing but trouble.
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Old 01-04-2017, 05:40 AM
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Quote:
Originally Posted by evan@limitlessdiesel View Post
what year truck? The full transgo is nothing but trouble.
2003
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