How much power can a stock L36 transmission handle? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 07-26-2005, 03:38 PM   #1
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Default How much power can a stock L36 transmission handle?

Well, it'* like the title says, how much power from the engine can a stock L36 transmission take without biting the dust?
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Old 07-26-2005, 03:50 PM   #2
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100 ft-lb of torque.






just kidding.

depends. some here have died stock, others have held up to more abuse...

<edit> i don't think i've seen 95naSTA have a tranny swap yet, and he'* prolly our fastest L36 around, so hopefully he'll chime in if he has any dyno info to share...
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Old 07-26-2005, 04:37 PM   #3
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It all depends on how much you beat on it. However, when you start doing mods that require you to tear apart your engine, then you should be careful.
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Old 07-26-2005, 04:51 PM   #4
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Quote:
Originally Posted by mkaake
<edit> i don't think i've seen 95naSTA have a tranny swap yet, and he'* prolly our fastest L36 around, so hopefully he'll chime in if he has any dyno info to share...
I've got the older 4t60-e which has it'* differences from the 4t65-e. My tranny is only 35k old though (dealer rebuild).
I know buck531 (L36 lumina) over at clubgp put down 233hp/251 tq with a stock tranny and intense GEN1 LSD with higher 90k+ mileage. It didn't last much longer than that dyno though.
And TimberWarp (gpgt) has been running a csc kit on his stock tranny/diff for a while now.
Those setups are both geared to higher end power unlike the m90 with it'* monster low end torque. So they are a little more friendly.
I've read over and over that the differential on the 4t65-e is the major weak link. Also, the internals are said to be very similiar between the -e and -hd. Swap the 4t65-e diff for the 4t65-hd one and you should be able to handle much more power.
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Old 07-27-2005, 02:21 AM   #5
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hopefully our tranny expert will chime in here with the differences.
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Old 07-27-2005, 03:06 AM   #6
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Default Re: How much power can a stock L36 transmission handle?

Quote:
Originally Posted by VigCS
Well, it'* like the title says, how much power from the engine can a stock L36 transmission take without biting the dust?
I'd like to know that, too.
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Old 02-11-2011, 03:04 AM   #7
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Default 4T60-E swap to HD Possible 4T65 HD

I have a 96 bonnie se with a 99 l67 swap and it finally started taking out the stock tranny .
I can still drive it for about 300 miles or so with no trouble then sometime i have issues just driving in the city for about 30 miles . It starts with over drive going out then eventually 4 and 3 . then after the call cools for about 30 mins its gtg . Not to sure what the issue is but the tranny fluid did get burn alittle :( and it leaks some out of the driver side . But i want to do the swap before it finally goes . I want to atleast do the 4T60-e hd swap and MAYBE the 4t65 hd depending everything that is involved with it .
Also is it bad idea to run with the supercharger by pass closed at all time . Sadly it has improved my gas mileage and the low to mid throttle torque is awesome but not to sure if it will aid in premature failure of anything
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