700R4 speedometer gear selection
12-04-2001, 07:54 AM
#1
Racer
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700R4 speedometer gear selection
My 700R4 has a 18teeth drive gear and 39 teeth driven gear.
According to the calculator at Bowtie I should have a 17/39 combinations with my 3.08 rear and 255/60R15.
In other words, I only have to swap the 18 drive gear with a 17teeth.
But how does this work? Are there offset sleeves?
Another question: The yoke from my TH350 has some pretty bad wear and corrosion pits. I can sand/polish it in a lathe. Is this a good idea? How much can I reduce the diameter before I will have a leak? (It was leaking in the TH350)
According to the calculator at Bowtie I should have a 17/39 combinations with my 3.08 rear and 255/60R15.
In other words, I only have to swap the 18 drive gear with a 17teeth.
But how does this work? Are there offset sleeves?
Another question: The yoke from my TH350 has some pretty bad wear and corrosion pits. I can sand/polish it in a lathe. Is this a good idea? How much can I reduce the diameter before I will have a leak? (It was leaking in the TH350)
12-05-2001, 02:33 AM
#2
Melting Slicks
Re: 700R4 speedometer gear selection (Ingar, Norway)
Ingar,
Regarding the speedometer gears, I still haven't found out which combinations can be used in the 30 series carrier vs. the 40 series carrier. I will certainly send you an email when I find an answer.
Yoke:
Maybe after you have the drive shaft shortened, the yoke will be in a slightly different position which will allow the new seal to ride on a fresh surface. If so, you shouldn't have a problem. If not. . .
Regarding the speedometer gears, I still haven't found out which combinations can be used in the 30 series carrier vs. the 40 series carrier. I will certainly send you an email when I find an answer.
Yoke:
Maybe after you have the drive shaft shortened, the yoke will be in a slightly different position which will allow the new seal to ride on a fresh surface. If so, you shouldn't have a problem. If not. . .
12-05-2001, 06:47 AM
#3
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Re: 700R4 speedometer gear selection (Ingar, Norway)
Are you sure you have 18 teeth on the drive gear? What color is it? I've never heard of an 18T drive gear for the 700R4.
My calculations show that for a 255/60R15 with a 3.08 rear you can use a 15T/35T, 16T/38T, or 17T/40T combination.
My calculations show that for a 255/60R15 with a 3.08 rear you can use a 15T/35T, 16T/38T, or 17T/40T combination.
