Looking to upgrade the 4L70E in the SS

P

Prochrgd1

Forum Member
I'm looking into getting some upgrades done to the 4l70E that resides in the "kid hauler". I'm basically looking to do servos, shift-kit & stall with the necessary supporting parts. Does anyone know of any local reputable shops or garage mecahnics that would be up for the task? I'd love to tackle the job myself but coming from the wonderful world of T-5 Mustangs and now 2 kids I dont have the time or know-how to get the job done.

The truck is a 2wd bolt-on 07 TBSS (headers, intake, exhaust, tune, suspension).

Any insight would be greatly appreciated.

Thanks

Jake in Westland
 
Get a 4l80e or swap over to something else.the 4l70 is a ticking time bomb. I would personally leave it alone.
 
I've got 12,000 on it with no problems to date. I do know alot of people have have had them replaced under warranty. I could drop 3K into an RPM level V and convertor but would rather spend the extra $$ elsewhere on the rig. Right now it's my daily driver and I just want a little more snap. Next year I plan to park it and really get into it.
 
Its the hard shifting that makes them go bang.

Prochrgd1 said:
I've got 12,000 on it with no problems to date. I do know alot of people have have had them replaced under warranty. I could drop 3K into an RPM level V and convertor but would rather spend the extra $$ elsewhere on the rig. Right now it's my daily driver and I just want a little more snap. Next year I plan to park it and really get into it.
Click to expand...
 
Prochrgd1 said:
I'm looking into getting some upgrades done to the 4l70E that resides in the "kid hauler". I'm basically looking to do servos, shift-kit & stall with the necessary supporting parts. Does anyone know of any local reputable shops or garage mecahnics that would be up for the task? I'd love to tackle the job myself but coming from the wonderful world of T-5 Mustangs and now 2 kids I dont have the time or know-how to get the job done.

The truck is a 2wd bolt-on 07 TBSS (headers, intake, exhaust, tune, suspension).

Any insight would be greatly appreciated.

Thanks

Jake in Westland
Click to expand...

Are you planning on more HP mods in the future? I have not heard of many problems on the 4L70E in the TBSS, we flogged them pretty hard on the track when the TBSS was in development with no probs. More converter shouldn't hurt it, but I'd throw a trans cooler on it. It's easy to tap off the cooler line going to the bottom of the radiator and mount a cooler between the rad and the grill... been there, done that.
The one Lingenfelter supercharged TBSS I drove was holding up astonishingly well considering the power the stock trans was taking. They hadn't even touched the trans cal in their truck either.
 
On second thought you could go with a 4r70w ford trans. Lots smaller then a 4l80e and almost as strong as a th400 without to much screwing around.
 
I Was Wondering When

Sean said:
On second thought you could go with a 4r70w ford trans. Lots smaller then a 4l80e and almost as strong as a th400 without to much screwing around.
Click to expand...

You were going to say 4r70w.

I can handle building the converter and doing some upgrades if your interested. Without tearing down the trans, the best bang for the buck is going to be a shift kit and a billet 4th servo. For a kid hauler you don't want to get too aggressive.

Mike.
 
So I said it. the 4l70 trans has issues.

Ridings Automatics said:
You were going to say 4r70w.

I can handle building the converter and doing some upgrades if your interested. Without tearing down the trans, the best bang for the buck is going to be a shift kit and a billet 4th servo. For a kid hauler you don't want to get too aggressive.

Mike.
Click to expand...
 
Ridings Automatics said:
You were going to say 4r70w.

I can handle building the converter and doing some upgrades if your interested. Without tearing down the trans, the best bang for the buck is going to be a shift kit and a billet 4th servo. For a kid hauler you don't want to get too aggressive.

Mike.
Click to expand...

you build converters?? details please?
 
beertestr said:
Are you planning on more HP mods in the future? I have not heard of many problems on the 4L70E in the TBSS, we flogged them pretty hard on the track when the TBSS was in development with no probs. More converter shouldn't hurt it, but I'd throw a trans cooler on it. It's easy to tap off the cooler line going to the bottom of the radiator and mount a cooler between the rad and the grill... been there, done that.
The one Lingenfelter supercharged TBSS I drove was holding up astonishingly well considering the power the stock trans was taking. They hadn't even touched the trans cal in their truck either.
Click to expand...

Thats weird, all i have herd is problems with them.
 
Its to much mass on the transmission when shifting. If you leave the trans calibration alone and don't shift the unit to hard it will not break parts. I have see a bunch of these 4l70 units torn down after tunes and shift kit installs and the sunshell and plantarys are always beat to hell.

beertestr said:
What's the issue on a pretty much stock (+25 hp) truck?
Click to expand...
 
Sean said:
Its to much mass on the transmission when shifting. If you leave the trans calibration alone and don't shift the unit to hard it will not break parts. I have see a bunch of these 4l70 units torn down after tunes and shift kit installs and the sunshell and plantarys are always beat to hell.
Click to expand...

So...... if somebody messes with it, it breaks... but if it's left stock and not messed with it's OK? Sounds like the tunes and shift kits are the problem not the trans.

Will it burn up the clutches instead of breaking hard parts if it isn't "tuned" or shift-kitted? I gotta say out of all the TBSS's I have driven, the trannies shift crisp, are the most responsive 4L60/65/70-E trannies I have even driven.

I'm not gonna cry from the mountain top that the 4L60/65/70-E is the best damn trans out there, don't get me wrong here. But with the extensive experience I have had with LS2 TBSS's I saw that trans get beat on all to hell and it held up better than I thought it would. The Caveat is that it was a stock truck, no serious power adders. I alone had over 100 1/4 mile runs in one, among other abuse, and the trans still felt great.

For a intake-headers-cat-back truck, I wouldn't bother with a shift kit or tune.
 
If you pull the timming retard on shifting out of the tune and then firm up the shifts things go kaboom. I agree though do the bolt on's leave the calibration alone. If you pull out the timming retard you have to turn up line pressure or you will burn the frictions. If you shift it hard enough to not burn up the clutches the sunshell and planetary go kaboom. This is a well documenteted problem.

The 4l60e works fine in lighter vehicles to a point but with all the mass of the truck shifting it hard just shocks it to much to be liveable.

beertestr said:
So...... if somebody messes with it, it breaks... but if it's left stock and not messed with it's OK? Sounds like the tunes and shift kits are the problem not the trans.

Will it burn up the clutches instead of breaking hard parts if it isn't "tuned" or shift-kitted? I gotta say out of all the TBSS's I have driven, the trannies shift crisp, are the most responsive 4L60/65/70-E trannies I have even driven.

I'm not gonna cry from the mountain top that the 4L60/65/70-E is the best damn trans out there, don't get me wrong here. But with the extensive experience I have had with LS2 TBSS's I saw that trans get beat on all to hell and it held up better than I thought it would. The Caveat is that it was a stock truck, no serious power adders. I alone had over 100 1/4 mile runs in one, among other abuse, and the trans still felt great.

For a intake-headers-cat-back truck, I wouldn't bother with a shift kit or tune.
Click to expand...
 
You must log in or register to reply here.
Back
Top