Putting Se transmission in GT

Asked by Jun 19, 2014 at 12:54 PM about the 1999 Pontiac Grand Am 4 Dr GT Sedan

Question type: General

I have a 99 GT and the tranny went. I purchased a low mileage used tranny for a V6 se by
accident. Will the difference in gear ratio be a problem with compatibilty? Does the ecu
need to be reflashed?

1 Answer

4,645

The SE and GT used different gear ratios. Will it work? Yes, but you will have poor acceleration and poor gas mileage. Not sure about flashing the ECU - the trans needs to run the program it was built for. I would put that tranny on Ebay and get the right one.

1 of 1 people found this helpful.

Your Answer

Add photo

Related Questions

  • Putting Se transmission in GT 1 answer

    I have a 99 GT and the tranny went. I purchased a low mileage used tranny for a V6 se by accident. Will the difference in gear ratio be a problem with compatibilty? Does the ecu need to be reflashed...

    1999 Pontiac Grand Am 4 Dr GT Sedan

    -

    General

  • can a 1997 grand am gt and a 2003 grand am gt parts fit together to fit in one car

    i got A 1997 GRAND AM GT AND A 2003 GRAND AM GT I'M TRYING TO SEE IF I CAN TAKE PARTS OFF A 2003 AND PUT THEM IN A 1997

    1997 Pontiac Grand Am 2 Dr GT Coupe

    -

    General

  • Transmission 1 answer

    I drive a 1999 grand am gt 2 door. My car won't go in forward or reverse. Added three quarts of transmission fluid IT moved. Put it in park, came back the next day and I wss back to square one wi...

    1999 Pontiac Grand Am 2 Dr GT Coupe

    -

    General

  • Has anyone realized on the pontiac 2001 gt under the radio in the little storage area there is a lit 4 answers

    Has anyone realized on the pontiac 2001 gt under the radio in the little storage area there is a little knob in the back what is that knob for?

    2001 Pontiac Grand Am GT

    -

    General

  • Transmission Fluid 1 answer

    Can i use atf+4 transmission fluid in my 1998 Pontiac Grand am Gt. Its a 3.1 V6

    1998 Pontiac Grand Am 4 Dr GT Sedan

    -

    General

Search Pontiac Grand Am Questions

Pontiac Grand Am Experts

#1 tenspeed
tenspeed
Reputation 7,710
#2 John Saffrahn
John Saffrahn
Reputation 1,600
#3 Tom Demyan
Tom Demyan
Reputation 1,460
View All

Related Models For Sale

Used Pontiac Grand Prix
27 Great Deals out of 2,823 listings starting at $1,991
Used Pontiac Firebird
14 Great Deals out of 763 listings starting at $3,490
Used Ford Mustang
717 Great Deals out of 44,996 listings starting at $1,500
Used Chevrolet Camaro
348 Great Deals out of 31,370 listings starting at $2,500
Used Chevrolet Malibu
1,161 Great Deals out of 79,219 listings starting at $2,500
Used Chevrolet Impala
613 Great Deals out of 35,546 listings starting at $899
Used Honda Civic
872 Great Deals out of 85,333 listings starting at $500
Used Pontiac Bonneville
5 Great Deals out of 542 listings starting at $1,799
Used Toyota Camry
1,216 Great Deals out of 84,969 listings starting at $750
Used Chevrolet Cavalier
3 Great Deals out of 992 listings starting at $695
Used Honda Accord
1,048 Great Deals out of 68,868 listings starting at $1,000

Used Cars For Sale

2004 Pontiac Grand Am For Sale
268 listings starting at $1,599

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.