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Thread: rear ratio w/ richmond 6 speed
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02-08-2006 #1
rear ratio w/ richmond 6 speed
howdy all. i'm about to fill a new 9" rear with gears and would appreciate some input on a ratio. the car is a 65 tempest with a 455 and the aforementioned richmond 6 speed. i looked through the forum and alot of people were asking about rear ratios with a t56 but this trans has a little different gearset, specifically the ratios are 3.27/2.13/1.57/1.23/1.00/0.76 the car had a 3.23 stock rear and 27" tires; 3000 rpm in 6th was 100 mph.
I'm thinking of dropping to a 3.00 rear, since 6th could be a little taller and 1st was too low. this trans is a little hurt though, which brings up the opportunity to freshen it up and change some gear ratios if needed. i know they sell it with 3.01 and 2.77 1st, and up to .62 6th, and there's a ton of other possibilities. i'm not into drag racing so i don't need a real low 1st gear. the next 455 should have 600hp, so i'd also prefer a numerically lower 1st for strength. i know this trans is probably not as strong as a t56, but it's what i have, and i do like the close ratios and 1:1 5th. and it sounds good and fits easily behind a pontiac v-8.
so, ideally, what combinations of rear and transmission ratios could perform well?
thanks
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02-14-2006 #2Registered User- Join Date
- Nov 2002
- Location
- Georgetown,TX
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- 2,557
Just me but I think I would leave the 3.23's in the car and try them out,first.
02-15-2006 #3the old rear end can't go back in... the car has truckarms now.
thanks for the input
02-15-2006 #4Registered User- Join Date
- Nov 2002
- Location
- Georgetown,TX
- Posts
- 2,557
A .76 sixth gear,3.00 rear cog,and a 27" rear tire would have the engine turning around 2,000rpm at 70mph,,or in that neighborhood.
I'm running a Viper T56 (.50 sixth) and with a 4.11 rear cog & 26" rear tires,that's what I'm seeing.
02-15-2006 #5