Speedometer not working, so transmission is rough shifting

DAVID BARELA

MEMBER
2001 CHEVROLET SUBURBAN
5.3L
V8
4WD
AUTOMATIC
175,000 MILES

After installing a transmission from a 2003 Chevy trailblazer into a 2001 Chevy suburban, the speedometer doesn't work and the transmission isn't changing gears properly. I put a new speed sensor on.

Sunday, August 28th, 2016 AT 4:29 PM

5 Replies

SATURNTECH9

MECHANIC
30,870 POSTS

I looked up what Vechiles are compatible with the 2003 trail blazer and it's only compatible with the 2003 Chevy suburban not the 2001 so right there could be your problem.I posted a list of compatible years and models that match your Vechile.

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Sunday, August 28th, 2016 AT 6:04 PM

SATURNTECH9

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30,870 POSTS

Iam sorry there's a couple of different transmissions for the four wheel drive the one I posted for was one. There is more then one though.

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Sunday, August 28th, 2016 AT 6:07 PM

SATURNTECH9

MECHANIC
30,870 POSTS

Is this a 1500 or 2500?Also did the one in the suburban have a removable bell housing on the transmission?How about the one from the trail blazer?

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Sunday, August 28th, 2016 AT 6:10 PM

DAVID BARELA

MEMBER
1 POST

It's a 1500. Yes they both had removable bell housings. They are the exact same transmission, they had same numbers and all.

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Sunday, August 28th, 2016 AT 10:10 PM

SATURNTECH9

MECHANIC
30,870 POSTS

So what are the exact code numbers not code descriptions in the computer?So did the transmission work in the blazer?Also what was your old transmission doing before you changed it?