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Author Topic:   gears
chevythunder93
Dirt Roller

Total posts: 7
posted April 22, 2001 01:17 AM
i am looking for 308 gears. what year and make of cars did these come in?

snapper
Dirt Roller

Total posts: 17
posted April 22, 2001 01:26 AM
i believe it is a 85 impala with a 4 speed overdrive - old sheriffs car


chevythunder93
Dirt Roller

Total posts: 7
posted April 22, 2001 02:22 AM
what's the gear ratio in a turbo hydro 250 in first and second? also what cars came with 240's in a 7.2 rearend.

mongo21
Dirt Moderator

Total posts: 67
posted April 22, 2001 02:32 AM
IN A TH350 THEY ARE 2.52 FIRST,1.52 SECOND HOPE THAT HELPS.

chevythunder93
Dirt Roller

Total posts: 7
posted April 22, 2001 02:47 AM
thanks! but i really need for a 250. i am running a 1980 sunbird but i don't have enough gear to run in either first or second gear. we need to change the gears but aren't sure what to put in there. i am running 273's and it's not enough. HELP!!!!

Pickel
Dirt Freak

Total posts: 239
posted April 22, 2001 09:17 PM UIN: 25419780
The gear you are looking for comes factory in the old Chevy Novas with a 2 speed power glide. If you can't locate one let me know I believe I know where one is. Thanks Pickel

chevythunder93
Dirt Roller

Total posts: 7
posted April 22, 2001 10:20 PM
i believe the rearend you are talking about is a 8.5 inch ring gear. wich will not bolt onto a 7.2 inch third member. i am just looking for gears to fit into a 7.2 abd i want to know what type of cars to look into. 1978 and up.

cas23
Dirt Roller

Total posts: 14
posted April 22, 2001 11:15 PM UIN: 25501394
i don't remeber what gear ratio the 250 is but when we switched from a turbo 350 to the 250 we picked up 500 rpm's if that helps.

racer17j
Dirt Maniac

Total posts: 165
posted April 23, 2001 01:57 AM UIN: 54865418
i'm not sure if you can but have you tried going to a different tire size i run a 308 7.5 out of a nova run it in 2nd gear in a t350 on 3/8 4/10 1/2 tracks and just change my rear tires for the track. what size is your rear i have never heard of a 7.2 ? 7.5 and 8.2 but not a 7.2. what did it come out of

[This message has been edited by racer17j (edited April 23, 2001).]

chevythunder93
Dirt Roller

Total posts: 7
posted April 24, 2001 03:24 PM
gonna try tire size also we are going try to see what a 180 or 200 does. thanks for al the info!!!!!

fanofdirt
Dirt Roller

Total posts: 10
posted April 25, 2001 08:46 AM
The gear ratio in a 250 trans is the same as a 350. 2.52 lo 1.52 second and 1.1 hi gear.
The biggest difference in the 2 transmissions is the 250 has some lighter weight parts so it will have less rotating weight.

[This message has been edited by fanofdirt (edited April 25, 2001).]

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