60chev
Contributor
Posts: 117
Loc: Rotchester, NY
Reg: 01-24-09
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01-20-21 06:31 AM - Post#2812462
Transmission only works in 2nd and drive. Have to manually start in 2nd and upshift to drive. Have no 1st gear and no overdrive. Checked for power to tranny and it is getting 12v to red and orange wires. Could it it be just bad shift solenoids maybe or something else. Thanks for any help.
60chev
1960 Bel-Air 4-door 305/3onthe tree
1994 C20 350/4L60e |
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 Chevytech
Subject Matter Expert - Senior Member
Posts: 3922
Loc: Twin Cities, Minnesota, U...
Reg: 04-25-04
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01-20-21 07:14 AM - Post#2812464
In response to 60chev
The computer can store trouble codes for the transmission. Check the computer for codes.
For those of you that are wondering why you are not getting replies to your thread:
Did you give the model, year, engine, fuel system type, and transmission information?
If your vehicle has been altered from stock, let us know about that too. |
Edited by Chevytech on 01-20-21 09:12 AM. Reason for edit: Missing word
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65_Impala
Very Senior Member
Posts: 4666
Reg: 12-29-02
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01-20-21 09:07 AM - Post#2812469
In response to 60chev
The gear is not there, like being in neutral or the gear is just never selected. Big difference between the two.
The "1-2" shift solenoid is used by the computer to select 1st gear and OD, so with it failed the computer can only shift the transmission between 2nd and 3rd gear.
Can you select manual 1st gear with the shifter? I'm not positive on this but I think the computer still needs to select 1st as well or the transmission will be in 2nd gear.
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60chev
Contributor
Posts: 117
Loc: Rotchester, NY
Reg: 01-24-09
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01-20-21 10:09 AM - Post#2812476
In response to 65_Impala
No 1st gear at all. Put in 1st and just goes to 2nd. Then take off and manually shift to 3rd/drive. Try to shift to OD, nothing. No slippage in 2nd or drive. No check engine light, OBD 1 anyways. All you will get is a code 12 for tranny trouble I believe.
60chev
1960 Bel-Air 4-door 305/3onthe tree
1994 C20 350/4L60e |
Edited by 60chev on 01-20-21 10:13 AM. Reason for edit: No reason given.
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65_Impala
Very Senior Member
Posts: 4666
Reg: 12-29-02
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01-20-21 11:50 AM - Post#2812488
In response to 60chev
Try to shift to OD, nothing.
No shift or no forward drive?
The shift solenoid could be bad and cause the gears to never get selected because the PCM does the gear selecting with the solenoids.
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JeremyB
Senior Member
Posts: 762
Reg: 10-31-01
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01-20-21 01:46 PM - Post#2812491
In response to 60chev
If it was a 96, I would tell you it has an ignition switch issue and to use a headlight to check for voltage at the trans as voltmeters can give misleading results because they put no load on the circuit
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60chev
Contributor
Posts: 117
Loc: Rotchester, NY
Reg: 01-24-09
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01-28-21 10:54 AM - Post#2813139
In response to JeremyB
:UPDATE:
Changed out the 2 shift solenoids at back of tranny under the pan and now tranny works fine. Shifts thru all the gears smooth. Double checked and I actually have a 4L60e not 80e FYI. Thanks for your help anyways guys.
60chev
1960 Bel-Air 4-door 305/3onthe tree
1994 C20 350/4L60e |
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 someotherguy
Senior Moderator
Posts: 29352
Loc: Texas
Reg: 08-01-03
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01-28-21 11:26 AM - Post#2813141
In response to 60chev
:UPDATE:
Changed out the 2 shift solenoids at back of tranny under the pan and now tranny works fine. Shifts thru all the gears smooth. Double checked and I actually have a 4L60e not 80e FYI. Thanks for your help anyways guys.
Thanks for posting back with the update. IF your C2500 has 6 lug wheels that makes it the 7200lb GVWR model, a.k.a. "light duty 2500" - vs. the regular C2500 most think of with the 8 lug wheels and 8600lb GVWR.
There are quite a few differences between the two models, but yes indeed yours would have the 4L60E instead of the 4L80E. Other than the wheel bolt pattern, 9.5" 14 bolt semi-floating rear axle, a heavier spring package, and a few extra small support pieces on the frame, the truck is more or less a beefed-up C1500. Not putting it down, so don't get me wrong; I've had a few and they're great trucks.
Richard
| 06 Silverado ISS / 06 Silverado SS / 06 300C SRT8 |
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