DREAMZ28

iTrader: (1)

My cars a DD, 125k miles, trans has never been rebuilt, and I'm thinking of going 370/376, nothing more than cam only. Probably make around 420. worried that the increase in torque will make short work of my trans.. It sees all kinds of traffic and highway/city driving, some stop light to stop light runs and highway rolls, nothing past 3rd gear ever really. Not much track, only been once.

How long would it last, or would it be so bad that it'd be neccesary to go built trans?


Hell I'm scared a cam only 346 would make short work of my trans.. Am I just being paranoid?

TXZ28LS1

iTrader: (5)

I am in the same boat as you. I have a 00 WS6 and i have heads,cam, 4k stall waiting to go in.

I am hoping my trans holds up long enough for me to get a beefed up tranny. Hopefully babying my car will help keep it alive...lol.

DREAMZ28

iTrader: (1)

Yea I'm kind of iffy about it. Guy I used to work with lost I think reverse, and he only had 99k miles, so I guess its just how well you take care of it.

It gets regular fluid changes and I don't completely **** on it all the time.. I wonder if there's people going to 150-170k without any problems

DREAMZ28

iTrader: (1)

As for my motor, I'm either going 370/6 with a stock top end or a bored 5.3 to 346, cam only. Getting the 370 short block and a cam is just a pipe dream as of right now

HCI2000SS

iTrader: (2)

I went from a LS1 (346) to my current LQ9 (370) and it will make a little more torque sooner, but nothing that's going to be big or anything

DREAMZ28

iTrader: (1)

How long have you been on the 370? And how many miles do you have?


I figure a lot of it can be in the tune also, between torque management and shift firmness it could probably make a big difference.

HCI2000SS

iTrader: (2)

I got back in Sept of 2013, and have only put maybe 700-800 miles on it. Yes the tune can make a difference as well, but there simply isn't a huge difference with 24 cubic inches. Enough so to where running a slightly bigger cam than I did with the LS1, has made it actually a bit less torquey thank it was with the 346 LS1 and smaller cam

ragtopz28

iTrader: (57)

Heat is what kills a tranny. I smoked one in my old car (bolt-on only).
If you baby it (and have a good cooler) you should be fine.....but who wants to do that and live in fear.
I went overkill on my current car with a FLT level VI

DREAMZ28

iTrader: (1)

My wallet does lol. I'd much rather build from the back of the car forward, but the motor took a **** so why not go 370 now you know. And yea it has a cooler, don't know the specs but PTC told me it was the 'medium' size one. Probably around 16-20k.



One other thing I was wondering is is there a limit to how high I should spin it? Being that RPM=heat. I was planning on a 6800 shift point but I just read a post that stated you shouldn't go over 6200..

DREAMZ28

iTrader: (1)

Ah, well I wasnt planning on making tons of torque with this motor, 4000 stall so I want the most power from there to 6500-7000 or so. Figured I'd go a tad late on IVC and let her spin.