View Single Post
Old 01-07-2015, 01:29 PM   #6
homemade87
Registered User
 
Join Date: Apr 2010
Location: Guntersville Alabama
Posts: 1,073
Re: Auto trans decision help for my new LSx build

Quote:
Originally Posted by derotoreut View Post
Hey guys, I am beginning work on my first frame off with LSx install on a 71 SWB. I'm having a custom chassis built by Scott's Hot Rod. I haven't determined my exact engine yet, but I plan to look for a new GM engine/trans package. I decided to go with an automatic transmission and Scott's recommended setting up the chassis for a 4L60e transmission. Can you give me any insight on if this is a good way to go? from what little I know, it sounds like the 4L80e is a stronger transmission, but may be bigger and heavier. What are my options, and what would be a good way to go? Right now I am considering possibly new LS2 or LS3 engine/auto trans combo. Please help me with my auto trans options, so I am able to get the chassis set up properly. I will need to get back with them before they move too far along with fabrication. Thanks.
You did not mention what your goals are and how you will be using the truck . This will make a big difference on which way we need to steer you . If it is basically a driver with some spirited street driving and a occasional tow the 4l60e will be fine . Of coarse with a good trans tune and a good trans cooler .

If you are beating on it and taking it the track regularly the 4l80e may be a better choice .

If buying a new trans you may look into a 4l60e or 4l70e from finish line transmissions . They have several different levels of builds . I have there level five . This may also be a little easier to set up with a stock pcm . It was a plug and play for me with my 04 truck operating system . This option would not cost that much more than a stock trans new .

If you do use a stock 4l60e and have problems just get it built to suit your need down the road . I have seen people beat on the stock ones pretty bad and they are still holding on. The key is get it tuned to help it survive and a trany cooler. Heat is mostly what kills them during performance .

Last edited by homemade87; 01-07-2015 at 01:36 PM.
homemade87 is offline   Reply With Quote