mfg Posted May 3, 2023 Report Posted May 3, 2023 Why do some folks consider the four speed transmission used in '61 thru early '62 Studebakers (Chevy bolt pattern case) to be more desireable than the four speed trans used in late '62 thru '64 Studebakers and Studebaker Avantis?
mfg Posted May 3, 2023 Author Report Posted May 3, 2023 On 5/3/2023 at 4:44 PM, pantera928 said: more easy to find parts? Expand Nope...parts are equally easy to find!
r1lark Posted May 3, 2023 Report Posted May 3, 2023 Because of the gear ratios.....................😊
Nelson Posted May 4, 2023 Report Posted May 4, 2023 I agree, gear ratios. Early box is close ratio 2.20 low and later are the wide box 2.54 first gear. R3/ R4 cars had the 2.20 box.
Dwight FitzSimons Posted May 4, 2023 Report Posted May 4, 2023 So, R3/R4 cars used the Chevy-bolt-pattern T10?
mfg Posted May 4, 2023 Author Report Posted May 4, 2023 On 5/3/2023 at 10:10 PM, r1lark said: Because of the gear ratios.....................😊 Expand On 5/4/2023 at 12:18 AM, Nelson said: I agree, gear ratios. Early box is close ratio 2.20 low and later are the wide box 2.54 first gear. R3/ R4 cars had the 2.20 box. Expand That's it men!.....As the earlier box was basically right out of a Corvette, (excepting for the Stude input shaft), most all of them had close ratio gearing ..... The later box normally had less desirable 'wide' gear ratios, unless the 'close' gears were special ordered, or the car had a Granatelli engine. One Stude Avanti owner actually scared up the unique early four speed GM style clutch housing just so he could install that 'close' early four speed in his car! 😃
mfg Posted May 4, 2023 Author Report Posted May 4, 2023 On 5/4/2023 at 2:08 AM, Dwight FitzSimons said: So, R3/R4 cars used the Chevy-bolt-pattern T10? Expand Nope....close ratio gears could be ordered in the later '62-'64 Ford bolt pattern transmission case. (late '62)
Dwight FitzSimons Posted May 4, 2023 Report Posted May 4, 2023 On 5/4/2023 at 2:14 AM, mfg said: Nope....close ratio gears could be ordered in the later '62-'64 Ford bolt pattern transmission case. (late '62) Expand Ok, I remember now that close-ratio gears were an option. As far as close-ratio gears being more desirable, that depends on the differential ratio and the intended use of the car. A 4-spd Avanti with 2:20 first gear and a 3.31 diff would be a dog off the line. I have an R3 Avanti with 3:31 diff and the (wide ratio, A833 ?) Chrysler 4-spd and that combination is great for street driving. --Dwight
mfg Posted May 4, 2023 Author Report Posted May 4, 2023 On 5/4/2023 at 12:08 PM, Dwight FitzSimons said: Ok, I remember now that close-ratio gears were an option. As far as close-ratio gears being more desirable, that depends on the differential ratio and the intended use of the car. A 4-spd Avanti with 2:20 first gear and a 3.31 diff would be a dog off the line. I have an R3 Avanti with 3:31 diff and the (wide ratio, A833 ?) Chrysler 4-spd and that combination is great for street driving. --Dwight Expand That makes sense..it's really all about how the car is to be driven.
regnalbob Posted May 5, 2023 Report Posted May 5, 2023 The close ratio 4 speed (T10C) became available as an option for the Avanti after 9/16/63 Because of the late availability its possible no Avantis were built with the close ratio transmission.
Nelson Posted May 6, 2023 Report Posted May 6, 2023 On 5/5/2023 at 9:22 PM, regnalbob said: The close ratio 4 speed (T10C) became available as an option for the Avanti after 9/16/63 Because of the late availability its possible no Avantis were built with the close ratio transmission. Expand Bob. You could be right with the R1 and R2 cars but all the R3 4 speed Avantis did have the close ratio box. It must have been standard equipment for the R3 cars in general and you would need to special order the wide box.
regnalbob Posted May 6, 2023 Report Posted May 6, 2023 On 5/6/2023 at 6:25 PM, Nelson said: Bob. You could be right with the R1 and R2 cars but all the R3 4 speed Avantis did have the close ratio box. It must have been standard equipment for the R3 cars in general and you would need to special order the wide box. Expand Nelson, Based on two Studebaker Sales Letters the close ratio was listed as an option for all model Avantis. 1 Prices and changes - Avanti R3 Ultra High Performance Engine. # 161 6/10/63 " Required with this engine at extra cost is a four-speed floor mounted manual shift transmission with optional close-coupled ratios." 2 New Avanti Options and Revised Avanti Order Guide. #174 9/16/63 " For those wanting a 4 Speed Manual Transmisson with a close ratio, we are making available the T10C transmission." I have found that R-5546 does have the close ratio transmission. If your R-5237 has the close ratio that will be two out of five. Would be interesting to know if the other three have the close ratio.
Nelson Posted May 7, 2023 Report Posted May 7, 2023 The way I read that is the close ratio transmission is required with the R3 and it will cost more money. Is that what you are thinking? R5546 is close ratio. Maybe the wide box could be special ordered with the R3?
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