please help choose drive and driven gear after rear end swap
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Joined: Oct 2006
Posts: 114
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From: Kiev Ukraine
Car: Firebird 91
Engine: Vortec 350 224/230cam, ported head
Transmission: TH700r4 with vette servo,hd oil pum
Axle/Gears: now 3.73 posi old 3.23 posi
please help choose drive and driven gear after rear end swap
I have Firebird 91 i swap 3.23 gear to 3.73 but have problems with speedometer gears, my transmission is new and came to me without gears at all . 700R4 . i found some red drive gear and install it driven gear is dark gray (i think) and when i drive 100 km\h by GPS my speedometer show me 160 km\h
i try to calculate teeth on 700r4.com but my english is bad and i dont understand some porameters . can someone tell me what gears should i buy yo see real speed of my car. rear tires is 255/65/15' on 10' rim . thanks
i try to calculate teeth on 700r4.com but my english is bad and i dont understand some porameters . can someone tell me what gears should i buy yo see real speed of my car. rear tires is 255/65/15' on 10' rim . thanks 
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Joined: Oct 2008
Posts: 6,319
Likes: 19
From: Northern Utah
Car: seeking '90.5-'92 'bird hardtop
Engine: several
Transmission: none
Axle/Gears: none
Re: please help choose drive and driven gear after rear end swap
you need a 15 tooth drive gear, and a 40 tooth driven gear.
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