Register or Log In To remove these advertisements. |
|
|
|
Thread Tools | Display Modes |
|
11-07-2017, 11:31 PM | #1 |
Registered User
Join Date: Apr 2012
Location: Solvang, Ca 93463
Posts: 323
|
PG speedo drive gear & driven gear w/30.5 tires
3.73 rearend, does anyone know what color gears for 30.5 tires? Or just a driven gear change? Thanks in advance
|
11-08-2017, 12:13 AM | #2 |
Registered User
Join Date: Nov 2017
Location: Woodlawn, TN
Posts: 16
|
Re: PG speedo drive gear & driven gear w/30.5 tires
If you know your drive gear tooth count you can use this formula to choose the best driven gear. According to NTW a 30.5" tire does 684 revs/mile
(# Drive Teeth x Axle Ratio x Tire Rev. per Mile) / 1001 = driven gear tooth count |
11-08-2017, 12:19 AM | #3 |
Registered User
Join Date: Apr 2012
Location: Solvang, Ca 93463
Posts: 323
|
Re: PG speedo drive gear & driven gear w/30.5 tires
Cool, I was hoping someone knew which drive gear came with PG and 3.73 in a c10
|
11-08-2017, 12:23 AM | #4 |
Registered User
Join Date: Nov 2017
Location: Woodlawn, TN
Posts: 16
|
Re: PG speedo drive gear & driven gear w/30.5 tires
tire size will throw it off pretty considerably.....take for instance using your combination and if you had a 8T drive gear you would be best with a 20T (blue) driven which originally came in 3.08 axle ratio. There were several different combinations of drive/driven gear sets to account for different tire size/gear ratio combinations
|
11-08-2017, 12:29 AM | #5 | |
Registered User
Join Date: Apr 2012
Location: Solvang, Ca 93463
Posts: 323
|
Re: PG speedo drive gear & driven gear w/30.5 tires
Quote:
|
|
11-08-2017, 10:01 PM | #6 | |
Senior Member
Join Date: Nov 2012
Location: Southeast Michigan
Posts: 790
|
Re: PG speedo drive gear & driven gear w/30.5 tires
Quote:
Speedometer heads are calibrated to read 60 mi/hr at 1,000 speedometer cable rev/min. |
|
11-08-2017, 11:15 PM | #7 |
Registered User
Join Date: Apr 2012
Location: Solvang, Ca 93463
Posts: 323
|
Re: PG speedo drive gear & driven gear w/30.5 tires
Oh cool, thank you. It was exactly right on with the p235 75r 15 so I was bummed when it was way off. I will pull the cable and bullet and see if thats whats in there. Is there a point where the driven gear wont match up with the drive gear? Like a range low to high with each drive gear or does any driven gear work with any drive gear? Just wondering..
|
11-09-2017, 12:12 AM | #8 |
Registered User
Join Date: Nov 2017
Location: Woodlawn, TN
Posts: 16
|
Re: PG speedo drive gear & driven gear w/30.5 tires
You should be good, there is a different housing size when you get into the large drive and driven gears but you "should" have a small drive gear and to the best of my knowledge all the driven gears that fit that housing will work with whatever drive gear you have in there....which is more than likely the small 8 tooth.
Just looked it up and 18-23 tooth driven gears fit the powerglide housing. |
Bookmarks |
|
|