1978 301 2bbl auto trans wont go into reverse unlexx reved high and wont shift up into normal drive gear regardles of rpm

Asked by Feb 19, 2013 at 08:03 PM about the 1978 Pontiac Grand Prix

Question type: Maintenance & Repair

4 Answers

sounds like you need to take a look at shift linkage from carb to kickdown. Is it still there? It is out of whack at least 1/4"--

1 of 1 people found this helpful.

I was told by a few it could be a vaccume leak goig to the trans, do they have any sort of vaccume controlled componate that assist in changing gears or hydrolic pressur in the trans??? Had it since 1984 but been in storage since 1996.

....no, not the VACUUM MODULATOR???

21,815

yes modulator, controls pressure,pull the hose and suck on it, should be springey,no leaks and a good vac. hose!

Your Answer

Grand Prix

Looking for a Used Grand Prix in your area?

CarGurus has 2,675 nationwide Grand Prix listings starting at $1,750.

ZIP:

Pontiac Grand Prix Experts

  • #1
    Js08016
    Reputation
    4,470
  • #2
    Tom Demyan
    Reputation
    3,110
  • #3
    munron
    Reputation
    2,510
View All

Related Models For Sale

Used Chevrolet Impala
585 Great Deals out of 34,416 listings starting at $900
Used Dodge Charger
461 Great Deals out of 33,534 listings starting at $1,999
Used Pontiac Bonneville
486 listings starting at $1,799
Used Chevrolet Monte Carlo
10 Great Deals out of 1,246 listings starting at $999
Used Ford Mustang
612 Great Deals out of 39,252 listings starting at $1,895
Used Pontiac Grand Am
1,079 listings starting at $1,500
Used Chevrolet Malibu
1,086 Great Deals out of 62,139 listings starting at $880
Used Chevrolet Camaro
460 Great Deals out of 31,468 listings starting at $1,450
Used Pontiac Firebird
9 Great Deals out of 767 listings starting at $4,000
Used Dodge Challenger
263 Great Deals out of 25,070 listings starting at $7,750
Used Chrysler 300
351 Great Deals out of 19,418 listings starting at $900

Used Cars For Sale

2008 Pontiac Grand Prix For Sale
11 Great Deals out of 442 listings starting at $1,750
2007 Pontiac Grand Prix For Sale
3 Great Deals out of 365 listings starting at $2,295
2006 Pontiac Grand Prix For Sale
438 listings starting at $3,950
2005 Pontiac Grand Prix For Sale
362 listings starting at $4,488

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.