I just meet the coolest guy. He use to work for GM as a Trans Tech for the 4T60 series and he said if I ever need to borrow any of his books, to let him know. He said that I can put 3:73's in my trans. Has anyone ever heard about this? and what do you guys think. This guy built a Monte Carlo Track car in his garage, so I am sure he knows his stuff.

Nice find, sounds like a good hookup!! Highest gearing available for our cars, iirc, is 3.69's as listed on ZZP's website. But then again I know next to nothing about transmissions, and your guy claims he worked on 4t60E's for years, so yeah....Definitely interested to hear more about this 3.73 gearing idea...... I'd be cautious before letting him tear into your trans, though. Some people say they can do many things and talk a good game but end up only being good at one thing...bullshitting. Just something to think about

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2005 Pontiac Grand Prix:|SE front|SPO grilles|HPTuned|HUD added|5-button DIC swap|Wizaired CAI|180*|EGR delete|GMPP rear sway|F&R STBs w/DRs brackets|3.29s|HD Diff|7/8" chain|WBS TA's|SD Headers|GenV SSM90 Hybrid(INSTALL PENDING)

theres a lot of people running 3.69's i dont see 3.73 gears being an issue but what gear/reluctor/chain/deifferential make up 3.73 gearing?

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'05 WRX STi - COBB Stage 2|Invidia DP|3" Borla XR-1|Coilovers|Camber Plates|Swaybars|Endlinks|Bushings|Braces|Anti Lift Kit|DBA4000s|SS lines|
Sold: 06 Cobalt SS/SC, 99 GTP 245WHP/326 Ft-lbs, 06 R6

^see, that's what I didn't get either. Not saying it's not possible, just sounds a lil sketchy. Hope youre not gonna be his guinea pig for this 3.73 project Travis

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2005 Pontiac Grand Prix:|SE front|SPO grilles|HPTuned|HUD added|5-button DIC swap|Wizaired CAI|180*|EGR delete|GMPP rear sway|F&R STBs w/DRs brackets|3.29s|HD Diff|7/8" chain|WBS TA's|SD Headers|GenV SSM90 Hybrid(INSTALL PENDING)

why would you want 3.73s my car can't hook with the 3.29s why would i even want a higher gear unless i had a stock 3100 i keed i keed

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92 LeBaron Convert: Turbo 3L 97 Grand Prix GT 4dr "Frankenstein": L67 4t65 swap
97 Grand Marquis: Summer DD 99 Grand Prix GTP: Top Swap Beater

plus your gas mileage is gonna go to crap with anything other than 3.29's

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'05 WRX STi - COBB Stage 2|Invidia DP|3" Borla XR-1|Coilovers|Camber Plates|Swaybars|Endlinks|Bushings|Braces|Anti Lift Kit|DBA4000s|SS lines|
Sold: 06 Cobalt SS/SC, 99 GTP 245WHP/326 Ft-lbs, 06 R6

but i like my 32 mpg highway (or so my math tells me)

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92 LeBaron Convert: Turbo 3L 97 Grand Prix GT 4dr "Frankenstein": L67 4t65 swap
97 Grand Marquis: Summer DD 99 Grand Prix GTP: Top Swap Beater

Real men car about the 1/4 mile

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2006 Honda 1000RR (Sale Pending)
GMC Sierra 1500HD (After Basic Training )

In a 3100, the FDR was 3.33:1 anyhow. Going to a 3.73 wouldn't be THAT big of a deal.

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One Big Ass Mistake America

and i like my 36 mpg highway

for the record im switching to 3.29s when install my race trans.

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'05 WRX STi - COBB Stage 2|Invidia DP|3" Borla XR-1|Coilovers|Camber Plates|Swaybars|Endlinks|Bushings|Braces|Anti Lift Kit|DBA4000s|SS lines|
Sold: 06 Cobalt SS/SC, 99 GTP 245WHP/326 Ft-lbs, 06 R6

3.29s arnt that bad,i had them in my regal. i got like 32 MPG on the highway. City is quite a bit different LOL

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2006 Honda 1000RR (Sale Pending)
GMC Sierra 1500HD (After Basic Training )

i have got like 19-ish in the city

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92 LeBaron Convert: Turbo 3L 97 Grand Prix GT 4dr "Frankenstein": L67 4t65 swap
97 Grand Marquis: Summer DD 99 Grand Prix GTP: Top Swap Beater