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Re: Where to buy a speedometer pinion gear?
[Re: Cuda67]
#461720
09/08/09 09:54 AM
09/08/09 09:54 AM
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Joined: Jan 2003
Posts: 21,065
Niles , Ohio
therocks
oh wait.but hey.lets see.oh yeah.
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oh wait.but hey.lets see.oh yeah.
Joined: Jan 2003
Posts: 21,065
Niles , Ohio
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Imperial Services makes the reducers any size you want.They arent cheap though.I have 3.91s in the 65 and my speedo is only about 10 % off.I believe I have an old Mopar reducer in the other garage.Bought it and never installed it.Ill have to find it and see if it is as Im going back to 4.88s or 4.56 and with those the speedo is way off.Oh I have seen some list the newer gears as fitting the 65 backs.They dont.Rocky
Chrysler Firepower
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Re: Where to buy a speedometer pinion gear?
[Re: John_Kunkel]
#461721
09/08/09 10:36 AM
09/08/09 10:36 AM
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Joined: Jun 2008
Posts: 3,916
usa
lewtot184
master
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master
Joined: Jun 2008
Posts: 3,916
usa
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Quote:
You can use any gear ratio/tire diameter calculator but you need to use 8 teeth as the drive gear for the '65 and earlier 727 instead of 13 like the '66 and later.
The early 904 and light duty standard transmissions have 7 teeth on the drive gear.
As stated earlier, high numeric gear ratios most often need a reduction unit unless the tires are large in diameter.
what john says! they never made a "3.91" pinion gear for the '65 and earlier tranny. a .80 reducer and a 21 tooth pinion are very close. only problem is 21 tooth pinions are near impossible to find. a 19 tooth pinion and a .70 reducer ( if imperial services makes one) would be close. be prepared to pay a couple hundred bucks for a reducer and speedo cable.
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Re: Where to buy a speedometer pinion gear?
[Re: Cuda67]
#461723
09/09/09 10:36 PM
09/09/09 10:36 PM
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Joined: Jun 2003
Posts: 4,872
connecticut
pnypwr
master
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master
Joined: Jun 2003
Posts: 4,872
connecticut
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there is a place called abbots I think they are down south, alabama missisipi somewhere, we got one for a custom rig we built at work...was 125 iirc
"Are you gonna bark all day lil doggy? Or are you gonna bite?"
05 ram 2500 ctd
74 gremlin x 360
65 mustang 347
70 coronet R/T 440
03 Mach 1
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