How much horsepower can my tranny handle? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 01-03-2006, 05:43 PM   #1
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Default How much horsepower can my tranny handle?

Do you guys know how much horsepower a 4T60-E transmission can handle? Because there are a lot of things I want to do with my 92 bonne and I need all the specs I can get so I don't blow the tranny.
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Old 01-03-2006, 06:16 PM   #2
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Well, I'm assuming your SSE isn't Supercharged, so until you do something drastic like add a turbo or aftermarket SC, you don't really have alot to worry about other than normal wear and tear failure from the miles on it.
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Old 01-03-2006, 07:26 PM   #3
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The reason I was asking because I have a plan of doing alot of modding in the next year or so. I mean heavily modding the car. I have looked up new camshafts, and everything you can think of without using a turbo or supercharger. Upgrading the injectors, fuel pump, heads and bearings you know all that good stuff.
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Old 01-03-2006, 07:28 PM   #4
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None of those are going to give you the low-end grunt of the L67, so I'd say your trans will be fine, other than the typical rebuild when it comes due.
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Old 01-03-2006, 07:44 PM   #5
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Easy enough thanks man
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Old 01-03-2006, 07:53 PM   #6
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if you keep it N/A, i dont think you will be able to put out enough low end torque to butcher your tranny without a poweradder or nitrous.. However, when you start making more power, you will probably start doing some tire spinning, and your differentail will suffer greatly, without an LSD unit
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Old 01-03-2006, 08:01 PM   #7
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If your staying n/a and not reving high, you should be alright.
I've read that the transmission pump in the 4t60 maxes out it'* efficiency at 5700 rpm.
Since your a L27, your not going to want to be revving too high anyways.
Granted, more power will wear your trans faster but it'* not going to kill it real fast.
Just be nice to it and don't do any one wheeler pealers.
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Old 01-03-2006, 09:51 PM   #8
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Help me out where can I get a LSD unit. That would be greatly appreciated
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Old 01-03-2006, 10:12 PM   #9
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You don't need an LSD. Every Bonneville here can lay two black stripes in a straight line burnout. The only people that need an LSD are hard-core dragstrip hounds or road course racers.

Spend the $700-$1000 on a shift kit and performance rebuild with heavy duty diff instead.
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Old 01-03-2006, 10:33 PM   #10
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Well I am not a die hard burnout king only when it comes to Honda civics that is the only time.lol So I won't need an lsd or a shift kit if I am easy on it all the time?
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