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Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Transmission - Rearend> What is applied when a 4L60 is in reverse
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Topic Review (Newest First)
08-04-2007 09:11 AM
Billvill ok I got it. Fluid is directed just like fuel thru an injector via PWM what will they thing of next.

I do want to keep my trans. I a paraplegic and use a wheel chair. I have hand controls and a lift in the van. I am interested in the 95 box for a usable unit while I build mine. I don't want any downtime.

I am a big believer of repairing what you have. That way you always know what you have.
08-03-2007 06:43 PM
Crosley torque management is the system that cuts power of the engine and pressure inside the trans during a high torque load upshift,

I have scanned a few vehicle systems with software from EASE diagnostic using a laptop computer. i did this during various levels of torque load on the vehicle.

The PCM will cut the engine timing advance back to zero at a high load upshift ( WOT). I saw this on a 2000 Silverado 5.3 2wd truck (mine).

I'll add to briscoe comments.... with the PWM systems of lockup there are new materials on the converter clutch to with stand the slippage of the lockup clutch.


08-03-2007 01:10 PM
briscoe
4l60e

No they don't build them like they used to, they build them better.

Many shops in my area have been slow this summer, I think they build them better now.

PWM is an acronym for pulse width modulation. Instead of an on off solenoid application, PWM allows for a partial application of components, such as torque converter clutchs. Maybe a, too simplistic explanation.

Your computer may not like the 95 valve body.

But I'm not too bg on switching stuff around anyway.

You don't want to stick with what you have? You said it drove and upshifted good, just a shudder in reverse, correct?
08-03-2007 10:04 AM
Billvill I feel like a rookie here PWM ?

Is that torque management ? If it is could I use the 93 valve body in the 95 unit ? I have heard nothing but bad things about torque management. I do have to do a burnout once a year at our clubs truck in.

PS: If my van didn't look and run so good, I would buy something from this century. However I don't think they build em like they used to.
08-02-2007 07:33 PM
Crosley
Quote:
Originally Posted by Billvill
Actually I found a 95 4L60E on our local craigslist with a converter and aluminum drive shaft out of a pickup for $150. He claims its good with high mileage. I may buy it just for a core to build. I have a 4L80 shaft with the good 1350 ujoints that I scored but the two yokes for the 4L60 and 10 bolt will cost me $100. I am hoping the pick up truck drive shaft is the same length as my van.

I do see where the 93/94 separator plate is one part # from Transgo and the 95 is a different #. Does anybody know if the 95 model is better or worse?

the separator plates are different because the lock-up strategy was changed to PWM in 1995.
08-02-2007 03:34 PM
Billvill Actually I found a 95 4L60E on our local craigslist with a converter and aluminum drive shaft out of a pickup for $150. He claims its good with high mileage. I may buy it just for a core to build. I have a 4L80 shaft with the good 1350 ujoints that I scored but the two yokes for the 4L60 and 10 bolt will cost me $100. I am hoping the pick up truck drive shaft is the same length as my van.

I do see where the 93/94 separator plate is one part # from Transgo and the 95 is a different #. Does anybody know if the 95 model is better or worse?
08-02-2007 06:46 AM
briscoe
4l60e

I can dig that. Once you have the pan off you will see if building it may be your only option.

But yeah, I would at least try the kit.
08-01-2007 09:31 PM
Billvill I think I am going to give that option a play. The trans just shifts and operates flawlessly in all forward gears. I really don't want to R&I it at this time. If the larger boost valve and opened up fluid feed does not resolve my issue I haven't spent any extra in that I would have added those items to the overhaul list.
08-01-2007 06:09 AM
briscoe
4l60e

The transgo kit does show you what hole to increase in size [ in the separator plate ] if you are only installing the shift kit and not going inside the trans, to rebuild it.
07-31-2007 07:50 PM
Billvill I have heard about the bleed hole from another builder also. He suggested opening up the separator plate to increase oil flow when reverse is applied. I wanted to install a shift kit no matter what I do so i think I may take that suggestion.

Any Input ? Do you guys know if the Transgo kit maps out the reverse flow hole in the separator plate ?
06-10-2007 04:37 PM
Crosley
Quote:
Originally Posted by Billvill
Thats exactly what I have come to believe. I am leaning toward stepping up to the 4L80. I was talking to Dave Jarvis who drag races a full size chevy van. The truck leaves wheel up and is close to breaking into the 9's with a small block. I asked him what box he was using. He told me it was a bone stock 4L80 with a good converter. If a clean low mile unit becomes available I think i will go that way. If I build a bullet proof 4L60 I could have over $800.00 in parts in it.

Thanks for the input.

budget in some extra cash for the conversion to a 4L80E unit....

drive shaft mods , fresh slip yoke, crossmember mods, wire harness conversion , ECM re-programing....

i may have forgotten something

06-10-2007 12:01 PM
Billvill Thats exactly what I have come to believe. I am leaning toward stepping up to the 4L80. I was talking to Dave Jarvis who drag races a full size chevy van. The truck leaves wheel up and is close to breaking into the 9's with a small block. I asked him what box he was using. He told me it was a bone stock 4L80 with a good converter. If a clean low mile unit becomes available I think i will go that way. If I build a bullet proof 4L60 I could have over $800.00 in parts in it.

Thanks for the input.
06-10-2007 11:28 AM
briscoe
what is applied

Bill this unit has an aluminum piston in the reverse input drum. Once you have it apart, look at that piston carefully. You will see a bleed hole in the piston, where the bottom 'waved' steel plate will flatten out against the piston, when this piston is applied.

Close that hole down in size. When new, this hole may not be a consideration, but, after awhile this hole size, because of many reasons, will let too much reverse oil leak thru, creating a reverse delay, or shudder in reverse.

I would suggest a transgo shift kit, a better sun gear shell, maybe the beast sun shell, a kit that provides the ability to install more clutchs in the 3-4 clutch pack.

There seems to be no end [ relative to parts ] to what you can install into the 4L60e trans, as you strive to make it better. Good luck!
06-10-2007 10:50 AM
Billvill good site ! thanks for the lead
06-09-2007 07:26 PM
smoke This site may give some ideas on what you want.

http://www.4l60-e.com/
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