Pontiac Grand Prix Forums : Grandprix
 

Grand Prix Forums is the premier Pontiac Forum on the internet. Registered Users do not see the above ads. Please Register - It's Free!

Pontiac Grand Prix Forum - Welcome Register today! Contact us!

Results 1 to 8 of 8
  1. #1
    SE Level Member
    Join Date
    Oct 2017
    Location
    Nunya way 124
    Posts
    5
    Chats
    0

    Default Revving high at 55 60 mph

    I have a 2002 gp gt 4 door, when at 60mph I'm revving about 2k and on hwy about 2500, anyone know what it might be?

  2. #2
    Killa Bee Scottydoggs's Avatar
    Join Date
    Aug 2010
    Location
    new jersey
    Posts
    37,531
    Chats
    155622

    Default Re: Revving high at 55 60 mph

    you lost over dive, aka the 4 th gear hub.

    if you get in the hwy and pull it into 3 rd and the rpms stay the same, you just confirmed it.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, 2.8, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW

  3. #3
    Turbo is the way to go. Fivefingerdeathpunch's Avatar
    Join Date
    Sep 2009
    Location
    Rogers, MN
    Posts
    20,608
    Chats
    80891

    Default Re: Revving high at 55 60 mph

    Word.

    4th gear with 2.93 is about 1900-2000 and with 3.29's it's like 2300ish doing about 68-70mph.

    SMGPFC Member #1

  4. #4
    SE Level Member
    Join Date
    Oct 2017
    Location
    Nunya way 124
    Posts
    5
    Chats
    0

    Default Re: Revving high at 55 60 mph

    Quote Originally Posted by Scottydoggs View Post
    you lost over dive, aka the 4 th gear hub.

    if you get in the hwy and pull it into 3 rd and the rpms stay the same, you just confirmed it.
    I shift into 4th tho so can it b that?

  5. #5
    Turbo is the way to go. Fivefingerdeathpunch's Avatar
    Join Date
    Sep 2009
    Location
    Rogers, MN
    Posts
    20,608
    Chats
    80891

    Default Re: Revving high at 55 60 mph

    If it shifts into every gear and does change rpm when you pull it back down into 3rd, something else is way wrong.

    Like internal transmission failure, major slipping or something.

    The most likely cause was said, if the 4th gear hub is gone. RPM at 60mph in 4th gear should not be 2500rpm, should be 500-600 less than that.

    SMGPFC Member #1

  6. #6
    SE Level Member
    Join Date
    Oct 2017
    Location
    Nunya way 124
    Posts
    5
    Chats
    0

    Default Re: Revving high at 55 60 mph

    Quote Originally Posted by Fivefingerdeathpunch View Post
    If it shifts into every gear and does change rpm when you pull it back down into 3rd, something else is way wrong.

    Like internal transmission failure, major slipping or something.

    The most likely cause was said, if the 4th gear hub is gone. RPM at 60mph in 4th gear should not be 2500rpm, should be 500-600 less than that.
    Is 2k at 60 2500 at 70 I feel 2k is high for 60 as ive been getting horrible mpg

  7. #7
    GT Level Member wstefan20's Avatar
    Join Date
    Aug 2017
    Location
    Raytown, MO
    Posts
    163
    Chats
    4

    Default Re: Revving high at 55 60 mph

    I third that. It's your 4th gear. Sucks to get to, but if you want to be cheap, you can access it through the wheel well with subframe dropped. I really do not recommend this due to 1) contamination and 2) if you're doing that much work, might as well rebuild your transmission while you're there. It's really not that bad. Just did mine.

  8. #8
    GT Level Member
    Join Date
    Mar 2017
    Location
    Internet
    Posts
    182
    Chats
    1890

    Default Re: Revving high at 55 60 mph

    It's the 4th hub. Search on my name and 4th hub shaft or something like that. It's not a horrible fix.

Similar Threads

  1. Revving itself when driving
    By aldgrandprix in forum 3.8L V6 Naturally Aspirated (L36)(L26)
    Replies: 5
    Last Post: 08-12-2012, 01:15 PM
  2. Slight hesitation while revving
    By dsmuts in forum 3.8L V6 Naturally Aspirated (L36)(L26)
    Replies: 5
    Last Post: 03-17-2012, 01:48 PM
  3. Car stalling and revving up
    By gpse2000 in forum 3.8L V6 Naturally Aspirated (L36)(L26)
    Replies: 4
    Last Post: 11-24-2011, 02:48 AM
  4. Revving when RPM's below 2000
    By Badley in forum General Tech Discussion
    Replies: 4
    Last Post: 03-31-2011, 08:44 AM
  5. Rapping/Rattle at Idle, goes away when revving
    By hoont79 in forum 3.8L V6 Supercharged (L67)(L32)
    Replies: 9
    Last Post: 08-07-2010, 05:25 AM

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •