4l60E or 700R4

[jekquistk5]

Ls swapping the blazer this winter. I have a good 700r4 behind my TBI350, and the 60E behind the 5.3 seems to shift okay and move. I have a bad 60E I planned on rebuilding for the ls swap if I bought just an engine, but I bought a running and driving truck instead. What would you guys do? I do want to shift the 60E manually via my art carr shifter if I go that way. Just trying to plan out what I should do.

 

[Bent77]

If you’re really set on using the shifter, 700. Is there something you have to do with the computer if it isn’t controlling the trans so it doesn’t “set a code”?

 

[jekquistk5]

If you’re really set on using the shifter, 700. Is there something you have to do with the computer if it isn’t controlling the trans so it doesn’t “set a code”?

From what I have read on LS1tech you can buy a transgo shift kit, and delete all the wiring and program the PCM to ignore the trans. I was just wondering how bad its going to be if I run a stock trans and manually shift it ie 1-2, 2-3 and if it bogs in 2nd if I manually bring it down to 1 will it actually shift down?

 

[Bent77]

Should. Only thing I’ve had the ECM override on a GM is the limiter, forces upshift
Early LT1 so not sure it applies

 

[jekquistk5]

All the camaro people say downshifting a 60E manually will kill all the nuns.

 

[Babaganoosh]

All the camaro people say downshifting a 60E manually will kill all the nuns.

I have yet to break one doing this.

 

[Fastereddie]

I have yet to break one doing this.

 

[mrk5]

So the 700 is full manual, no thottle valve cable? If you still need the throttle valve cable, I would definitely ditch the 700. If it's full-manual, then it wouldn't be too bad to keep it. Thing is once, you delete the wiring from the ECU to control the transmission, I would wonder how hard it would be to go back. Say you blew the 700 and needed a new trans, would you pretty much be stuck with another full-manual 700?

Personally I'd look at the 60e since the ECU for the engine will control it. I seem to remember the 700 from the factory will force a 1st to 2nd shift even with the gear selector in 1st, but you can defeat that with a shift kit. If you're worried the 60e can do something similar, I'll bet there is a shift kit to defeat that just like the 700.

 

[Babaganoosh]

So the 700 is full manual, no thottle valve cable? If you still need the throttle valve cable, I would definitely ditch the 700. If it's full-manual, then it wouldn't be too bad to keep it. Thing is once, you delete the wiring from the ECU to control the transmission, I would wonder how hard it would be to go back. Say you blew the 700 and needed a new trans, would you pretty much be stuck with another full-manual 700?

Personally I'd look at the 60e since the ECU for the engine will control it. I seem to remember the 700 from the factory will force a 1st to 2nd shift even with the gear selector in 1st, but you can defeat that with a shift kit. If you're worried the 60e can do something similar, I'll bet there is a shift kit to defeat that just like the 700.

You can keep the wiring and just tune it for a manual trans. I went with a 60E cause my 700r4 needed rebuilt and was no good, I liked the idea of the ecm controlling everything.

 

[Bent77]

 

[jekquistk5]

So the 700 is full manual, no thottle valve cable? If you still need the throttle valve cable, I would definitely ditch the 700. If it's full-manual, then it wouldn't be too bad to keep it. Thing is once, you delete the wiring from the ECU to control the transmission, I would wonder how hard it would be to go back. Say you blew the 700 and needed a new trans, would you pretty much be stuck with another full-manual 700?

Personally I'd look at the 60e since the ECU for the engine will control it. I seem to remember the 700 from the factory will force a 1st to 2nd shift even with the gear selector in 1st, but you can defeat that with a shift kit. If you're worried the 60e can do something similar, I'll bet there is a shift kit to defeat that just like the 700.

Yah I have a shift kit in the 700, I think i'll just run the 60e and see what happens, then get the other 60E i have that is bad rebuilt. Then i dont have to buy a crank spacer, flexplate, kickdown cable bracket etc.

 

[6872xtc]

So I gotta ask, if you go full manual shift, how are ya gonna hold your ice cream???

 

[campfire]

I seem to remember the 700 from the factory will force a 1st to 2nd shift even with the gear selector in 1st, but you can defeat that with a shift kit.

Neither of mine did that. For what little it's worth.

 

[Fastereddie]

Neither of mine did that. For what little it's worth.

I don’t think the diesel turns enough rpm to do it.

 

[jekquistk5]

So I gotta ask, if you go full manual shift, how are ya gonna hold your ice cream???

Good question.

 

[campfire]

I don’t think the diesel turns enough rpm to do it.

I would have thought the governor adjustment would have compensated for that. But I'm not sure about that.

 

[Fastereddie]

I would have thought the governor adjustment would have compensated for that. But I'm not sure about that.

I’m not certain either. I do think I remember winding the piss out of one and it shifted up when I had it in low.

 

[Babaganoosh]

I’m not certain either. I do think I remember winding the piss out of one and it shifted up when I had it in low.

My trans won't shift out of 1st unless I flog the piss out of the engine in low.

 

[diesel4me]

A TH400 will upshift into second with the shift lever in "low" when the rpms hit about 5200 RPMs...good luck getting a 6.2 to do it !..

 

[Babaganoosh]

A TH400 will upshift into second with the shift lever in "low" when the rpms hit about 5200 RPMs...good luck getting a 6.2 to do it !..

It's a programming issue with the ls swap I did. I don't have it hooked up to tell the ecm it's in low range so it's looking for mph to shift.