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Rebuild 93 4l60e, no 2_3 shift, Shifts from 1st to 2nd

Customer Question
Rebuild 93 4l60e, no 2_3...
Rebuild 93 4l60e, no 2_3 shift
JA: Tell me a bit more about what's going on so he can help you best.
Customer: Shifts from 1st to 2nd normal, when should shift to 3rd it kicks out of gear, goes back into 2nd when speed drops
JA: Are you hoping to fix this yourself?
Customer: Yes
JA: Great! What have you tried so far?
Customer: Like I said installed rebuild kit, checked shift selonoids
JA: Is there anything else the Chevy Mechanic should be aware of about your Chevy?
Customer: I don't think so
JA: I'm sending you to a secure page on JustAnswer so you can place the $5 fully refundable deposit now. While you're filling out that form, I'll tell the Chevy Mechanic about your situation and connect you two.
Submitted: 1 year ago.Category: Transmissions
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Answered in 12 minutes by:
3/28/2016
Transmission Mechanic: Gary, ASE Certified Technician replied 1 year ago
Gary
Gary, ASE Certified Technician
Category: Transmissions
Satisfied Customers: 17,258
Experience: 25 years GM master tech
Verified

I am sorry your having this problem

when it goes into 3rd it will act like neutral when its supposed to be in 3rd ?

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Transmission Mechanic: Gary, ASE Certified Technician replied 1 year ago

when this happens the issue is the 3-4 clutches air gap is too great or the 3-4 clutch piston is stuck or the 3-4 clutch piston seal is missing or torn

the only difference between 2nd and 3rd gear is the 3-4 clutch pack being applied and when its not 3rd will act like neutral

if you have any questions please ask as i do not get credit for my work until you rate me here at Justanswer

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Customer reply replied 1 year ago
Before rebuilding, it would slip going into 3rd with heavy throttle, then driving normal it lossed everything but 1_2 and 3_4 clutches were toasted, still only 1-2 after rebuild
Transmission Mechanic: Gary, ASE Certified Technician replied 1 year ago

did you air check the 3-4 clutches ?

what was the air gap you set for the 3-4 clutches ?

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Customer reply replied 1 year ago
Did not air check, and how would you do this
Transmission Mechanic: Gary, ASE Certified Technician replied 1 year ago

holding the drum up and applying air up the input drum shaft fluid hole with 30 psi and see if the 3-4 clutches apply

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Customer reply replied 1 year ago
Replaced seperater plate, because old one had over sized holes the balls were going Thur plate, order new one from local shop, have heard that two holes need to be enlarged some times, is there any thing to this
Transmission Mechanic: Gary, ASE Certified Technician replied 1 year ago

no you never have to enlarge any of the plate holes

new plate and the check balls all in place and where they belong

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Customer reply replied 1 year ago
How much air gap should the clutches have
Transmission Mechanic: Gary, ASE Certified Technician replied 1 year ago

.035 to .055 range keep them tighter on more so to the .035 side of the spec

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Customer reply replied 1 year ago
They are now, at first where is a slot and one ball sits in spot and goes in the slot, my son had two balls in slot it came from other trans, so had a total 10 balls
Transmission Mechanic: Gary, ASE Certified Technician replied 1 year ago

ok

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Customer reply replied 1 year ago
What part does the servo play
Transmission Mechanic: Gary, ASE Certified Technician replied 1 year ago

the servo is for the low reverse band and plays no part for 3rd gear

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Customer reply replied 1 year ago
Did notice that if shifter is in 1st or 2nd gear position it act as if it's in higher gear, doesn't have starting off power, but in 3rd or od position brakes won't hold it back
Transmission Mechanic: Gary, ASE Certified Technician replied 1 year ago

this 93 transmission does it have a big round electrical plug at it ?

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Customer reply replied 1 year ago
if you're talking about the one coming out of the case were it plugs to the external harness
Transmission Mechanic: Gary, ASE Certified Technician replied 1 year ago

if it has the big round plug be sure the pink wire at that connector shows 12 volts with the key ON

if it does go after that 3-4 clutch issue

if you have any questions please ask as i do not get credit for my work until you rate me here at Justanswer

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Transmission Mechanic: Gary, ASE Certified Technician replied 1 year ago

how are you making out ?

if you have any questions please ask as i do not get credit for my work until you rate me here at Justanswer

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Customer reply replied 1 year ago
Had it on rack, 1-2 selonoid would ground , change to 2nd would unground, 3-4 selonoid won't go to ground. After engine reached temp, 1-2 selonoid won't ground. Stays in 1st
Transmission Mechanic: Gary, ASE Certified Technician replied 1 year ago

did that pink have 12 volts at it ?

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Customer reply replied 1 year ago
still does
Transmission Mechanic: Gary, ASE Certified Technician replied 1 year ago

is it still going 1st then 2nd then kicking out of 3rd ?

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Customer reply replied 1 year ago
Not now, it's staying in first. By probing the selonoid wires using ohms. A selonoid would ground when shifter in OD position, would shift to 2nd, a selonoid would loose ground. B selonoid wouldn't ever ground. Now a nor b will ground in OD position. But in L1 B selonoid will ground
Transmission Mechanic: Gary, ASE Certified Technician replied 1 year ago

are you sure all the grounds are clean and tight on the engine ?

if so you need to see if you can shift this transmission with a scan tool

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Customer reply replied 1 year ago
Seems that the readings at trans change every time the trans was shifted from park to OD while running, one time the B selonoid was showing ground while in park
Transmission Mechanic: Tim's Auto Repair, Mechanic replied 1 year ago
Tim's Auto Repair
Category: Transmissions
Satisfied Customers: 16,079
Experience: I have been rebuilding automatic transmissions for 25 years
Verified

Hi, My name is ***** ***** for the delay.

I will do my best to assist you

i rebuild these everyday

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Transmission Mechanic: Tim's Auto Repair, Mechanic replied 1 year ago

the problem is the 3-4 clutches are burnt out

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Transmission Mechanic: Tim's Auto Repair, Mechanic replied 1 year ago

take it back apart and air check everything..

ad the transgo shift kit..

try not to use alto clutches.use raybestos if you can

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Transmission Mechanic: Tim's Auto Repair, Mechanic replied 1 year ago

the transgo shift kit is the best fix we have found to prevent the 3-4 clutch pack burn up

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Transmission Mechanic: Tim's Auto Repair, Mechanic replied 1 year ago

http://www.ebay.com/itm/Transgo-Shift-Kit-SK-4L60E-4L65E-TRANSGO-SHIFT-KIT-1993-2007-SK4L60E-/190822832896?hash=item2c6ded5b00:m:m9LN0kkq8N8--TXnuXpaNwQ&vxp=mtr

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Transmission Mechanic: Tim's Auto Repair, Mechanic replied 1 year ago

thanks

If you are satisfied with my answer, Please Rate my answer by clicking the rating button so I can get credit for my work. I’m not always going to be giving you good news, so please don't let this stand in the way of you accepting my answer. .it does not cost you more money and we will still be able to communicate, ,.please understand, i can not see, hear or touch the vehicle and only know what you tell me. Bonuses and positive feedback are appreciated.. if you are not satisfied with my answer, please do not leave bad feedback ,i will gladly opt out and let another expert handle the question. .if i have sent any diagrams, please print them. .sometimes you may need to right click the image [,then save picture as]to save it to your computer so you can open it with your picture program...Please ask if you need more help.

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Customer reply replied 1 year ago
The clutches are not burnt and seals ok
Transmission Mechanic: Tim's Auto Repair, Mechanic replied 1 year ago

if this isnt the 3-4's it is in the valve body,,it has a stuck valve.and isnt getting fluid pressure to the 3-4's

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Customer reply replied 1 year ago
No stuck valves either
Transmission Mechanic: Tim's Auto Repair, Mechanic replied 1 year ago

explain to me exactly what it does please

thanks

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Customer reply replied 1 year ago
Shifts to 2nd perfect, when reaches spead for third goes to neutral. The other thing that puzzles me is, if the gear selector is in D1 or D2, it has a slipping effect as if it's trying to pull off in a higher gear, like trying to start a manual trans of in 4th instead of 2nd or 3rd. The trans was rebuild and doing fine, while normal driving it appear to go to neutral and will no longer take 3rd
Transmission Mechanic: Tim's Auto Repair, Mechanic replied 1 year ago

ok//

the 3-4's have let go,,have you took it back apart yet?

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Transmission Mechanic: Tim's Auto Repair, Mechanic replied 1 year ago

and the 3-4's arent burnt any?

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Customer reply replied 1 year ago
No
Transmission Mechanic: Tim's Auto Repair, Mechanic replied 1 year ago

do they look like they have slipped any?

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Customer reply replied 1 year ago
Not really, lettering easily read
Transmission Mechanic: Tim's Auto Repair, Mechanic replied 1 year ago

ok..

has any parts been swapped.like maybe the pump or valve body?

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Transmission Mechanic: Tim's Auto Repair, Mechanic replied 1 year ago

the 93-94 " are by themselves

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Transmission Mechanic: Tim's Auto Repair, Mechanic replied 1 year ago

can you take a call?

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Customer reply replied 1 year ago
Same valve body, the torque converter seal had spun in pump cover, changed cover
Transmission Mechanic: Tim's Auto Repair, Mechanic replied 1 year ago

what year did you replace it with?

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Transmission Mechanic: Tim's Auto Repair, Mechanic replied 1 year ago

the 95-97 are different

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Transmission Mechanic: Tim's Auto Repair, Mechanic replied 1 year ago

also the separator plate is different..was it replaced?

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Customer reply replied 1 year ago
replaced seperater plate on valve body, holes were worn letting balls thru. Same model plate
Transmission Mechanic: Tim's Auto Repair, Mechanic replied 1 year ago

the front pump,,does it have the letters PWM on it?

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Customer reply replied 1 year ago
Seperater plate new thru trans shop, not where I can see pump, got it at trans shop and they matched
Transmission Mechanic: Tim's Auto Repair, Mechanic replied 1 year ago

there is something certainly not right there

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Transmission Mechanic: Tim's Auto Repair, Mechanic replied 1 year ago

it is in the valve body,plate or the pump,,there is no pressure getting to the 3-4

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Customer reply replied 1 year ago
I know, that's why I'm talking to an expert!!!!
Transmission Mechanic: Tim's Auto Repair, Mechanic replied 1 year ago

it isnt electrical,,the electrical is working,,it is shifting but nothing there

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Customer reply replied 1 year ago
OK will check further and get back with
Transmission Mechanic: Tim's Auto Repair, Mechanic replied 1 year ago

if you can,take the phone call option,i would like to talk to you

thanks

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Customer reply replied 1 year ago
I would like to have trans in front of me,while we talk and won't be able to do that untill Friday
Transmission Mechanic: Tim's Auto Repair, Mechanic replied 1 year ago

ok

get back with me,,

thanks

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Tim's Auto Repair
Tim's Auto Repair
Tim's Auto Repair, Mechanic
Category: Transmissions
Satisfied Customers: 16,079
16,079 Satisfied Customers
Experience: I have been rebuilding automatic transmissions for 25 years

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