700R4-4L60 slipping ?

[panheaddav]

Hey, I got a 4l60 out of a 92 blazer and rebuilt it with all upgrades etc. It's only the 2rd auto trans i've rebuilt. last year did my 4l60e out of my 2000 sierra 4x4. both with most same parts. this 1 i just put in my 64 el camino. took it up the street and only have reverse + 1st. just slips in 2rd, 3rd + 4th. its got a B&M hammer shifter so tried in in drive + manually. but while i was stopped, i power braked it + had back wheel spin in all forward gears? but would only get up driveway or move only in 1st. I have a 1800 stall convert, up to 2400. told them what i had + they said this 1 would b good. a little of what i put in it. 4th gear lockup kit,pinless accum piston kits, fairbanks kit, super servo,alto clutchs + steels.all clutch plates, steels, apply plates,etc r new, not just 3-4. pump upgrade kit,sonnax stator shaft kit,reverse boost kit,bonded steel piston kit with sprigs, sprags, pretty much all new hard parts + everything else. this is long enough. Thanks for any help. Dave

[Captainfab]

What did you use to connect the TV cable to the carb? Have you adjusted it and checked the line pressures to be sure they are correct?

[YoungPup1977]

I suggest to get an apply chart for what is applied in each gear and see if any thing is common with 2nd/3rd/and 4th since those are the three gears that seem to be slipping in your 700r4 rebuild...

A few things to consider:
forward clutch is applied in all forward gears (did it air check OK thru the pump stator)
Air check the over run clutch, forward clutch and the 3/4 clutch ?
How did you align the pump and stator ?

Forward sprag ?
2/4 is applied via the 2/4 servo which applies the band onto the reverse input drum for 2nd and 4th (not 3rd)

When I posted this I didn't see Captains post, I think he nailed it !!

[PGSigns]

With a 700 the tv cablbe and line pressures have to be checked BEFORE you drive it. I learned that early on in my 700 swap days. I have switched to the bowtie overdrives tv made easy setup and use there pressure check test. Really works well and you know before you smoke the trans that you have enough pressure rather than the way I learned smoking the trans to find out I did not have enough pressure.
Jimmy

[panheaddav]

Thanks for repiy's, I have holley corrector for TV cable. I always have it set a little tight 2 start, never loose. haven't checked line pressure yet. I pulled pan right after I 1st took it up the street. wanted to check it out right away. everything looked good. waiting for new filter, then 1st thing i will check pressure.

[panheaddav]

Originally Posted by Captainfab

What did you use to connect the TV cable to the carb? Have you adjusted it and checked the line pressures to be sure they are correct?

sorry don't do to many post,so i replied to my own post b4 i saw how 2 reply to u. I have the holley corrector 4 TV cable. always adjust cable on tight side 2 start, never loose. air check etc was all good. i wasn't in a hurry when i rebuilt this. spent a couple months + took my time making sure i did things right. but that''s not 2 say i still couldn't have screwed something up or 4got something. i know i didn't have any parts left over.lol

[YoungPup1977]

Did you replace the old TV valve in the valve body, lot of times the old type of TV valve sticks in the bore of the VB. This will be apparent when you put a gauge on the trans and you may see that with the TV cable connected or disconnected will show no increase in pressure (TV cable connected or disconnected)

Good Luck !

[PGSigns]

The only way to see if the parts you used to mount the TV cable at the carb are working like they should is with a pressure check. That's where I would go next when your parts come in.
Jimmy

[YoungPup1977]

Originally Posted by panheaddav

Thanks for repiy's, I have holley corrector for TV cable. I always have it set a little tight 2 start, never loose. haven't checked line pressure yet. I pulled pan right after I 1st took it up the street. wanted to check it out right away. everything looked good. waiting for new filter, then 1st thing i will check pressure.

Just curious on why you are changing the filter on a fresh rebuild after a couple of miles.... What's in the pan when you pulled it down ? metal in the pan so you replacing the filter ?

[Bigdav160]

Is it shifting? You said it has reverse and first. Is reverse strong? First OK? That would indicate the pressure regulator/boost is working and the forward sprag/low roller is holding.

Stuck TV valve, governor (if truly not shifting) servo piston seal out of place might be where I would start.

[panheaddav]

ok put a pressure gauge on it, p= 180, r= 175-190, n= 180, d-140-150, 3=150, 2= 150, 1= 150. that's with tv cable off and full. it dosen't change. pressure stays the same. it goes down an back up in between shifts but other then that its the same. reverse an 1st still strong. 2nd want to go if i step on it, but still slips. i pulled the governor, it looks alright. 1 spring is stronger then the other, guess thats normal. i ordered a new sonnax 1 anyway, got it for 56.00 new. tv valve wasn't stuck. any idea's. thanks.

[panheaddav]

i'm hoping it's not servo, because i have to pull trans or cut hole in tunnel to get it out.

[YoungPup1977]

So your trans is slipping in 2nd 3rd and 4th ?

Again, check out an apply chart to help you diagnose this thing.

If first is strong and not slipping I would think the forward clutches are holding so the slipping in second could point to the 2nd servo....if its slipping in 3rd as well, 3rd has different components being held to achieve 3rd gear within the planetary gears.....

Never seen a governor create a slip in 2nd/3rd and 4th.

The only thing common in 2nd 3rd and forth is the forward clutch but you said you have a strong 1st, is that in manual 1st and in the OD position ?

[panheaddav]

that's in drive or man 1st. or it would b in overdrive and man 1st. works in both no slipping, 1st or reverse. Talked to local trans shop, his the 1 who said could b gov. i figd it's one thing i didn't replace, cause they were all over 100.00 after shipping. until i found this 1 for 56.00. Thanks

[YoungPup1977]

700r4 Apply Chart:

[YoungPup1977]

Is it slipping in 2nd, 3rd and 4th ? Lets go a step at a time. In the OD position.

Does it slip in manual 2nd ?

[panheaddav]

crap, i don't remember if it shifted in 2 2rd in OD or if i shifted manually. I was worried didn't want 2 run it 2 long. just did a quick around the block. i was so busy looking at gauge to make sure pressure didnt get 2 low. I get the gov tuesday, so I'll take it out again and pay more att. thanks again I'll get back 2 u tuesday or wednesday. Still can't fig why the pressure would stay the same with tv valve open or closed?

[Bigdav160]

I am talking about the valve in the valve body. It's common for stick in max pressure. If the governor is working it will shift late - very late.

[YoungPup1977]

Let us know if its slipping or shifting late. Big difference. If you drove it only around the block most likely you never got it into 3rd or 4th.... so by saying it is slipping in 2nd 3rd and 4th may not be the case. The reason the dude at the trans shop told you to change out the governor. Get your TV pressures right and you may find you can drive more than just around the block.

GOOD LUCK !!

[panheaddav]

ok, put new gov in, its a sonnax #730, springs r way liter then stock ones. i had also loosened the tv cable 3/8" + 4got i had done that or i would have moved it back. cause now not sure which one helped the most. pressure is all down to bout 120psi. it shifts 1st to 2nd an starts to slip, so i stepped on it an
it caught just fine. same with 2nd to drive an drive to overdrive. but D to OD was too quick. then from OD back to D, have to floor it even only going bout 25 or 30 for it to up shift. it will chirp tires 1 to 2 and 2 to D, but 2 to D is pretty hard shift. then D to OD is too quick. i know the way i had the tv valve set with pan off, it was all the way opened at WOT. so now its 3/8" from full open. the more i drove it, it seemed to get better. took it for a mile +. it sure feels like converter was slipping, but then again what do i know. guess cause i got lucky with my 1st tranny rebuild that i was smarter then i am.Thanks again for any more advice.

[YoungPup1977]

Sounds like things have changed, glad you are moving in the right direction.

[panheaddav]

sorry again, i guess i should b repling to u instead of the post.ok, put new gov in, its a sonnax #730, springs r way liter then stock ones. i had also loosened the tv cable 3/8" + 4got i had done that or i would have moved it back. cause now not sure which one helped the most. pressure is all down to bout 120psi. it shifts 1st to 2nd an starts to slip, so i stepped on it an
it caught just fine. same with 2nd to drive an drive to overdrive. but D to OD was too quick. then from OD back to D, have to floor it even only going bout 25 or 30 for it to up shift. it will chirp tires 1 to 2 and 2 to D, but 2 to D is pretty hard shift. then D to OD is too quick. i know the way i had the tv valve set with pan off, it was all the way opened at WOT. so now its 3/8" from full open. the more i drove it, it seemed to get better. took it for a mile +. it sure feels like converter was slipping, but then again what do i know. guess cause i got lucky with my 1st tranny rebuild that i was smarter then i am.Thanks again for any more advice.

[YoungPup1977]

Originally Posted by panheaddav

sorry again, i guess i should b repling to u instead of the post.ok, put new gov in, its a sonnax #730, springs r way liter then stock ones. i had also loosened the tv cable 3/8" + 4got i had done that or i would have moved it back. cause now not sure which one helped the most. pressure is all down to bout 120psi. it shifts 1st to 2nd an starts to slip, so i stepped on it an
it caught just fine. same with 2nd to drive an drive to overdrive. but D to OD was too quick. then from OD back to D, have to floor it even only going bout 25 or 30 for it to up shift. it will chirp tires 1 to 2 and 2 to D, but 2 to D is pretty hard shift. then D to OD is too quick. i know the way i had the tv valve set with pan off, it was all the way opened at WOT. so now its 3/8" from full open. the more i drove it, it seemed to get better. took it for a mile +. it sure feels like converter was slipping, but then again what do i know. guess cause i got lucky with my 1st tranny rebuild that i was smarter then i am.Thanks again for any more advice.

You indicate that 4th is achieved a bit quick, you mentioned you installed a 4th gear lock up kit (which should be called TCC lock up kit) on your very first post. Was this 4th gear kit (TCC lock up kit) wired to the 4th gear oil circuit ? Do you have the instructions for this kit ? I am thinking when you say 4th is quick, its really the TCC engaging once 4th gear is achieved, because most of the wire kits sold on the market instructs the TCC solenoid to be wired to the 4th gear oil circuit, so once 4th gear is achieved the TCC solenoid is energized locking up the torque converter right after 4th gear is achieved....