Another TH350 Question
Thread Starter
Racer
Joined: Sep 2007
Posts: 288
Likes: 1
Another TH350 Question
You guys that are running TH350s what rear end gearing are you running? I have 3.70. Not looking to race my 68 (327 maybe 300+ HP) but was woundering what you think of your car at highway speeds.
charlie
charlie
Drifting
Joined: Apr 2006
Posts: 1,911
Likes: 2
From: gold coast queensland
im running 355 gears with a Th350 in an 81 with 3000 stall. i wouldnt want anything more than that. on the highway at cruise speed im sitting at about 3000rpm but thats ok cause it doesnt see the open roads often.
Race Director
Joined: Sep 2002
Posts: 10,362
Likes: 5
From: San Diego - Deep Within The State of CONFUSION!
OEM 3:08 gears in mine, but the reworked Turbo 350 has a 2500+ stall convertor in front of it.
She ain't much for gas mileage but I'll tell ya it downright SCOOTs just the way I like it.
She ain't much for gas mileage but I'll tell ya it downright SCOOTs just the way I like it.
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,118
From: Crossville TN
You really don't need that 'steep' of a gear for an automatic tranny. The converter provides some torque multiplication at lower rpm's, so you don't need that much gear. Without a lockup converter, you probably don't want anything lower than 3.36 or maybe 3.23...somewhere in that range for decent performance off the line and also not 'wound up tighter than a two-dollar clock' at highway speeds. I have the stock 3.08 with my THM400 and would still love to have the overdrive feature.
Drifting
Joined: Apr 2006
Posts: 1,911
Likes: 2
From: gold coast queensland
You really don't need that 'steep' of a gear for an automatic tranny. The converter provides some torque multiplication at lower rpm's, so you don't need that much gear. Without a lockup converter, you probably don't want anything lower than 3.36 or maybe 3.23...somewhere in that range for decent performance off the line and also not 'wound up tighter than a two-dollar clock' at highway speeds. I have the stock 3.08 with my THM400 and would still love to have the overdrive feature.
