Re: Where to buy a speedometer pinion gear?
[Re: mopars4ever]
#461706
09/07/09 12:50 PM
09/07/09 12:50 PM
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Joined: Feb 2005
Posts: 28,312 Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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Quote:
Not so easy to find. 1965 and down are different gears IIRC.
I was wondering that too...
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Re: Where to buy a speedometer pinion gear?
[Re: maximus]
#461709
09/07/09 12:59 PM
09/07/09 12:59 PM
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Joined: Jan 2003
Posts: 13,544 md
mopars4ever
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,544
md
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Quote:
Transmission part suppliers are the cheapest. The dealer wanted $60 for the one I needed, got it at D&E Transmission Supply for $17. They are located in Hazel Park Michigan.
Funny thing, I never got one email on a NOS 2538932 (66 and later years) gear I have for sale here on Moparts for $25 and the dealer wants $79 for the same thing.
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Re: Where to buy a speedometer pinion gear?
[Re: John_Kunkel]
#461715
09/07/09 10:33 PM
09/07/09 10:33 PM
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Joined: Feb 2006
Posts: 1,954 Illinois
SGTFURY62
OP
top fuel
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OP
top fuel
Joined: Feb 2006
Posts: 1,954
Illinois
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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.
Wow ...what a can of worms I opened up putting the lower gears in. I am only gonna guess that one of those stewart warner adapters are NOT easy to come by?
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Re: Where to buy a speedometer pinion gear?
[Re: Challenger 1]
#461717
09/07/09 10:59 PM
09/07/09 10:59 PM
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Joined: Nov 2008
Posts: 1,565 tennessee
pushbutton
pro stock
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pro stock
Joined: Nov 2008
Posts: 1,565
tennessee
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Quote:
Got a idea, get a GPS and use it for your speedo.
I've checked mine with those roadside radar signs and I know it's 10 mph fast. I've got two cars with 3:23's and 235-60-15's and they are both off by 10 mph.
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Re: Where to buy a speedometer pinion gear?
[Re: Challenger 1]
#461718
09/07/09 11:08 PM
09/07/09 11:08 PM
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Joined: Feb 2006
Posts: 1,954 Illinois
SGTFURY62
OP
top fuel
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OP
top fuel
Joined: Feb 2006
Posts: 1,954
Illinois
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Quote:
Got a idea, get a GPS and use it for your speedo.
LOL..it may come to that.
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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: 21,050 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: 21,050
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: 3,913 usa
lewtot184
master
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master
Joined: Jun 2008
Posts: 3,913
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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