Transmission problems

30

Asked by Aug 02, 2015 at 08:23 PM about the 2002 GMC Sierra 2500 4 Dr SL 4WD Extended Cab SB

Question type: Maintenance & Repair

I have a 2002 GMC Sierra 2500 and
before i bought it from a buddy he
drove it through a very large puddle
and it cracked his block. So we
replaced the engine and then the
tranny started giving him problems. It
would jump every time it shifted until
it finally just wouldnt drive or go into
reverse. So we replaced the Torque
converter and transmission with
another one, which was fried so he
sold the truck to me because he was
done with it. The new tranny won't go
into drive or reverse, only works in 3rd.
Ive heard plenty of reasons why, such
as the fluid pump is bad, the filter is
clogged, gears are shot and whole
transmission is done. I have two,
4L80E transmissions with the same
problem, buy a new one or is there
something i can do to save me $?

3 Answers

66,135

I'd suspect an electrical problem since this all started with the big (wet) puddle. Water can wreak havoc on the electrical system of a vehicle. Is the check engine light on? If so, what trouble codes do you have? A tranny problem can trigger the check engine light and set a trouble code. Make sure all the electrical connections having to do with the transmission are clean and tight. Check for damaged or disconnected wiring as well. HTH. -Jim

30

The transmission that was on the truck when it went in was replaced with what we thought was a good one. Right now the one that is on the truck isnt shifting into D or R only third.

1 of 1 people found this helpful.
30

Ok update on transmission. Wont engage drive or reverse but 1-3 gear works and when you get it up to ~50mph it works in D

2 of 2 people found this helpful.

Your Answer

Add photo

Related Questions

Sierra 2500

Looking for a Used Sierra 2500 in your area?

CarGurus has 135 nationwide Sierra 2500 listings starting at $4,995.

ZIP:

Search GMC Sierra 2500 Questions

GMC Sierra 2500 Experts

#1 Rowefast
Rowefast
Reputation 160
#2 tennisshoes
tennisshoes
Reputation 90
#3 JOHNG123
JOHNG123
Reputation 60
View All

Related Models For Sale

Used GMC Sierra 2500HD
111 Great Deals out of 14,005 listings starting at $2,650
Used GMC Sierra 1500
822 Great Deals out of 68,199 listings starting at $2,484
Used Chevrolet Silverado 2500
8 Great Deals out of 266 listings starting at $3,488
Used Chevrolet Silverado 2500HD
306 Great Deals out of 27,742 listings starting at $1,250
Used Dodge Ram 2500
160 Great Deals out of 5,240 listings starting at $3,495
Used Chevrolet Silverado 1500
1,717 Great Deals out of 175,749 listings starting at $1,250
Used Ford F-250 Super Duty
346 Great Deals out of 46,938 listings starting at $1,895
Used Ford F-150
2,194 Great Deals out of 206,316 listings starting at $1,499
Used GMC Sierra 1500HD
7 Great Deals out of 115 listings starting at $2,995
Used GMC Sierra 3500
3 Great Deals out of 268 listings starting at $5,995
Used Toyota Tundra
443 Great Deals out of 34,312 listings starting at $2,700
Used Dodge Ram 1500
455 Great Deals out of 11,152 listings starting at $700

Used Cars For Sale

2004 GMC Sierra 2500 For Sale
27 listings starting at $6,995
1999 GMC Sierra 2500 For Sale
7 listings starting at $9,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.