Thread: Gear Ratio Change

Page 1 of 3 123 LastLast
Results 1 to 20 of 48
  1. #1 Gear Ratio Change 
    GT Level Member 01GrandPrixTURBOGT's Avatar
    Join Date
    Dec 2011
    Location
    Decatur
    Posts
    449
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    i have a grand prix with the 4t65e transmission and its starting to slip. Im looking at buying a 4t65e hd tranny to replace it but i want to keep the 3.29 gear ratio. How do i do this? Do i just swap the differential before i put my tranny in? thanks for the help
    Reply With Quote  
     

  2. #2 Re: Gear Ratio Change 
    GXP Level Member JoRoW99's Avatar
    Join Date
    Jul 2009
    Location
    Grand Island, Nebraska
    Posts
    2,015
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    Keep the HD differential, and it's not where the gear ratio is. I I believe it's in the chain/cogs, and but don't quote me on that.
    '01 GT - Top swapped. ported SC/Heads/TB, SD headers, open cone, HPTuners, 3.4 MPS, 60#'s, E85.______________________SMGPFC #99_______________________
    Reply With Quote  
     

  3. #3 Re: Gear Ratio Change 
    GT Level Member 01GrandPrixTURBOGT's Avatar
    Join Date
    Dec 2011
    Location
    Decatur
    Posts
    449
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    If your right how hard is that to swap over?
    Reply With Quote  
     

  4. #4 Re: Gear Ratio Change 
    Moderator dsmuts's Avatar
    Join Date
    Feb 2011
    Location
    Coldwater, OH
    Posts
    15,758
    Thanks (Received)
    1
    Likes (Received)
    1
    Dislikes (Received)
    0
    Why not just put another trans with the 3.29 gear ratio? You'll need a new cv joint on the passenger side if you go with the hd trans.
    98 GTP modded 1.9's, sd headers, 3.4", zzp 1.0 230K miles scrapped.
    04 Comp G zzp stb's, UMI ta's, Speedbuilt sways, bully flo heads, XP, zzp headers, fsic, thrasher shift kit, 60#, 2.6" corsa 2.5", Inferno hood
    01 gt z7 turbo tep trans zzp motor
    08 g8 gt cam exhaust 11.87@118
    Reply With Quote  
     

  5. #5 Re: Gear Ratio Change 
    GT Level Member 01GrandPrixTURBOGT's Avatar
    Join Date
    Dec 2011
    Location
    Decatur
    Posts
    449
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    Because i may be buying a gtp that has some fender damage but runs fine and top swapping mine. Since my tranny is about to go out i was going to swap them also but i want the 3.29 gear ratio.
    Reply With Quote  
     

  6. #6 Re: Gear Ratio Change 
    Moderator dsmuts's Avatar
    Join Date
    Feb 2011
    Location
    Coldwater, OH
    Posts
    15,758
    Thanks (Received)
    1
    Likes (Received)
    1
    Dislikes (Received)
    0
    I'm not certain what needs changed out. I'd stick with the 2.93 though. You'll get better gas mileage.
    98 GTP modded 1.9's, sd headers, 3.4", zzp 1.0 230K miles scrapped.
    04 Comp G zzp stb's, UMI ta's, Speedbuilt sways, bully flo heads, XP, zzp headers, fsic, thrasher shift kit, 60#, 2.6" corsa 2.5", Inferno hood
    01 gt z7 turbo tep trans zzp motor
    08 g8 gt cam exhaust 11.87@118
    Reply With Quote  
     

  7. #7 Re: Gear Ratio Change 
    GT Level Member 01GrandPrixTURBOGT's Avatar
    Join Date
    Dec 2011
    Location
    Decatur
    Posts
    449
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    What about the difference in pull? Wouldn't 3.29s pull better though? Gas really isnt my concern.
    Reply With Quote  
     

  8. #8 Re: Gear Ratio Change 
    Moderator dsmuts's Avatar
    Join Date
    Feb 2011
    Location
    Coldwater, OH
    Posts
    15,758
    Thanks (Received)
    1
    Likes (Received)
    1
    Dislikes (Received)
    0
    With 3.29's you'll have more wheel spin. I've ridden in a car with 3.29's and they had a hell of a time with wheel spin.
    98 GTP modded 1.9's, sd headers, 3.4", zzp 1.0 230K miles scrapped.
    04 Comp G zzp stb's, UMI ta's, Speedbuilt sways, bully flo heads, XP, zzp headers, fsic, thrasher shift kit, 60#, 2.6" corsa 2.5", Inferno hood
    01 gt z7 turbo tep trans zzp motor
    08 g8 gt cam exhaust 11.87@118
    Reply With Quote  
     

  9. #9 Re: Gear Ratio Change 
    GT Level Member 01GrandPrixTURBOGT's Avatar
    Join Date
    Dec 2011
    Location
    Decatur
    Posts
    449
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    True i didnt really think off that and i dont really want to but new rims and tires. So if i swap trannys when i order the pcm for the top swap do i just put 2.93 in the gear option?
    Reply With Quote  
     

  10. #10 Re: Gear Ratio Change 
    Moderator dsmuts's Avatar
    Join Date
    Feb 2011
    Location
    Coldwater, OH
    Posts
    15,758
    Thanks (Received)
    1
    Likes (Received)
    1
    Dislikes (Received)
    0
    Yeah where are you ordering your tune from? You'll benefit greatly from an in car tune so that way you can make sure everything is good before you leave the place.
    98 GTP modded 1.9's, sd headers, 3.4", zzp 1.0 230K miles scrapped.
    04 Comp G zzp stb's, UMI ta's, Speedbuilt sways, bully flo heads, XP, zzp headers, fsic, thrasher shift kit, 60#, 2.6" corsa 2.5", Inferno hood
    01 gt z7 turbo tep trans zzp motor
    08 g8 gt cam exhaust 11.87@118
    Reply With Quote  
     

  11. #11 Re: Gear Ratio Change 
    GT Level Member 01GrandPrixTURBOGT's Avatar
    Join Date
    Dec 2011
    Location
    Decatur
    Posts
    449
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    I was going to get a zzp tune for starters so that i can drive the car until i can get a dyno tune or have someone who knows what there doing tune it.
    Reply With Quote  
     

  12. #12 Re: Gear Ratio Change 
    GT Level Member 01GrandPrixTURBOGT's Avatar
    Join Date
    Dec 2011
    Location
    Decatur
    Posts
    449
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    How fast is your car by the way DSMUTS can you take on 06 mustang gt's? Or GXP's?
    Reply With Quote  
     

  13. #13 Re: Gear Ratio Change 
    Moderator dsmuts's Avatar
    Join Date
    Feb 2011
    Location
    Coldwater, OH
    Posts
    15,758
    Thanks (Received)
    1
    Likes (Received)
    1
    Dislikes (Received)
    0
    Not sure on the mustang as i don't know what they run but I rode in my buddies ls4 monte ss and I didn't think it was that fast.
    98 GTP modded 1.9's, sd headers, 3.4", zzp 1.0 230K miles scrapped.
    04 Comp G zzp stb's, UMI ta's, Speedbuilt sways, bully flo heads, XP, zzp headers, fsic, thrasher shift kit, 60#, 2.6" corsa 2.5", Inferno hood
    01 gt z7 turbo tep trans zzp motor
    08 g8 gt cam exhaust 11.87@118
    Reply With Quote  
     

  14. #14 Re: Gear Ratio Change 
    GT Level Member 01GrandPrixTURBOGT's Avatar
    Join Date
    Dec 2011
    Location
    Decatur
    Posts
    449
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    Have you raced any lt1 camaros or 01 gts?
    Reply With Quote  
     

  15. #15 Re: Gear Ratio Change 
    Moderator dsmuts's Avatar
    Join Date
    Feb 2011
    Location
    Coldwater, OH
    Posts
    15,758
    Thanks (Received)
    1
    Likes (Received)
    1
    Dislikes (Received)
    0
    I haven't really raced anything worth while. I'm hoping to intercool soon and get it to the strip and see what i can run.
    98 GTP modded 1.9's, sd headers, 3.4", zzp 1.0 230K miles scrapped.
    04 Comp G zzp stb's, UMI ta's, Speedbuilt sways, bully flo heads, XP, zzp headers, fsic, thrasher shift kit, 60#, 2.6" corsa 2.5", Inferno hood
    01 gt z7 turbo tep trans zzp motor
    08 g8 gt cam exhaust 11.87@118
    Reply With Quote  
     

  16. #16 Re: Gear Ratio Change 
    GT Level Member 01GrandPrixTURBOGT's Avatar
    Join Date
    Dec 2011
    Location
    Decatur
    Posts
    449
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    Im just trying to get an idea on how fast a top swap with a 3.2 or 3.4pulley (depending on kock)intercooled,headers,180therm,CAI, and shift kit would run
    Reply With Quote  
     

  17. #17 Re: Gear Ratio Change 
    Moderator dsmuts's Avatar
    Join Date
    Feb 2011
    Location
    Coldwater, OH
    Posts
    15,758
    Thanks (Received)
    1
    Likes (Received)
    1
    Dislikes (Received)
    0
    I rode in a cammed intercooled top swap with a 3.4 and it was quite a bit faster than my car.
    98 GTP modded 1.9's, sd headers, 3.4", zzp 1.0 230K miles scrapped.
    04 Comp G zzp stb's, UMI ta's, Speedbuilt sways, bully flo heads, XP, zzp headers, fsic, thrasher shift kit, 60#, 2.6" corsa 2.5", Inferno hood
    01 gt z7 turbo tep trans zzp motor
    08 g8 gt cam exhaust 11.87@118
    Reply With Quote  
     

  18. #18 Re: Gear Ratio Change 
    GXP Level Member JoRoW99's Avatar
    Join Date
    Jul 2009
    Location
    Grand Island, Nebraska
    Posts
    2,015
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    I like my 3.29s except for the gas mileage thing, which really isn't that even that different. These cars need more gearing. My suggestion is to get the non-hd trans and switch out the differential. The reason the tires spin is because your tires are putting more power to the ground.
    '01 GT - Top swapped. ported SC/Heads/TB, SD headers, open cone, HPTuners, 3.4 MPS, 60#'s, E85.______________________SMGPFC #99_______________________
    Reply With Quote  
     

  19. #19 Re: Gear Ratio Change 
    GTX Level Member blakgtp's Avatar
    Join Date
    Sep 2011
    Location
    Vancouver
    Posts
    1,278
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    not the most educated on gear ratios here, but wouldnt the 2.93's have better top end and be better on the highway?
    Reply With Quote  
     

  20. #20 Re: Gear Ratio Change 
    GT Level Member 01GrandPrixTURBOGT's Avatar
    Join Date
    Dec 2011
    Location
    Decatur
    Posts
    449
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    I didnt think changing the diff changed the gear ratio. Gas and top speed dont really mean anything to me. I just want the best for 0-100.
    Reply With Quote  
     

Page 1 of 3 123 LastLast

Similar Threads

  1. gear ratio
    By shawnschuldt in forum PCM Tuning
    Replies: 3
    Last Post: 05-02-2011, 08:04 PM
  2. gear ratio change need pcm to be corrected
    By 2000 Black 2dr in forum PCM Tuning
    Replies: 0
    Last Post: 10-19-2010, 07:48 PM
  3. Gear ratio's??
    By reallyfast1 in forum 1997-2007 4 speed Automatic (4T65E) (4T65E-HD)
    Replies: 1
    Last Post: 09-10-2010, 10:10 AM
  4. gear ratio
    By gtpinsc in forum 1997-2007 4 speed Automatic (4T65E) (4T65E-HD)
    Replies: 2
    Last Post: 09-04-2010, 02:01 PM
  5. what is my differential ratio, and first gear ratio?
    By 2000GTP in forum 1997-2007 4 speed Automatic (4T65E) (4T65E-HD)
    Replies: 6
    Last Post: 11-07-2008, 09:31 AM
Tags for this Thread

View Tag Cloud

Bookmarks
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
  •