Pinion Gear Splines Update
#3131919
03/24/23 01:48 PM
03/24/23 01:48 PM
|
Joined: Jan 2006
Posts: 2,386 White Plains, NY
VCODE
OP
top fuel
|
OP
top fuel
Joined: Jan 2006
Posts: 2,386
White Plains, NY
|
1970 Challenger TA with 3:91 Gears. Which is correct for a 489 case pinion spline. A 10 spline pinion or 29 spline pinion. Did 1970 use both splines. Which application for which car. Something not adding up. Ring Gear # 2070225 3.91-1 MS291 8-4-69 Pinion # 2881460 3.91 3-6-69 10 Spline 7290 Yoke
Last edited by VCODE; 03/24/23 02:53 PM.
Mom & Dad let me buy a brand new 70 Challenger R/T 440 Six-Pack Super Trac Pack when I was 17
(Robert what is a 440 Six-Pack)
|
|
|
Re: Pinion Gear Splines Update
[Re: VCODE]
#3131983
03/24/23 06:06 PM
03/24/23 06:06 PM
|
Joined: Dec 2005
Posts: 11,739 Fulton County, PA
CMcAllister
Mr. Helpful
|
Mr. Helpful
Joined: Dec 2005
Posts: 11,739
Fulton County, PA
|
Both are available, depending on ratios, manufactures and luck.
If the results don't match the theory, change the theory.
|
|
|
Re: Pinion Gear Splines Update
[Re: CMcAllister]
#3132083
03/25/23 08:15 AM
03/25/23 08:15 AM
|
Joined: Dec 2007
Posts: 18,160 Mass
DAYCLONA
I Live Here
|
I Live Here
Joined: Dec 2007
Posts: 18,160
Mass
|
Both are available, depending on ratios, manufactures and luck. Agreed, but I've found the 10 spline more uncommon on E body 8 3/4 chucks over the decades
|
|
|
Re: Pinion Gear Splines Update
[Re: CMcAllister]
#3132084
03/25/23 08:24 AM
03/25/23 08:24 AM
|
Joined: Nov 2007
Posts: 21,847 Kirkland, Washington
Pacnorthcuda
Too Many Posts
|
Too Many Posts
Joined: Nov 2007
Posts: 21,847
Kirkland, Washington
|
Both are available, depending on ratios, manufactures and luck. Yep, there doesn’t seem to be a formula for determining which is “correct”.
|
|
|
Re: Pinion Gear Splines Update
[Re: Pacnorthcuda]
#3132093
03/25/23 09:16 AM
03/25/23 09:16 AM
|
Joined: Jan 2006
Posts: 2,386 White Plains, NY
VCODE
OP
top fuel
|
OP
top fuel
Joined: Jan 2006
Posts: 2,386
White Plains, NY
|
The Parts book shows both 10 and 29. with notes on each. Looks like 70 - 71 may have had a running change at some point
Last edited by VCODE; 03/25/23 09:16 AM.
Mom & Dad let me buy a brand new 70 Challenger R/T 440 Six-Pack Super Trac Pack when I was 17
(Robert what is a 440 Six-Pack)
|
|
|
Re: Pinion Gear Splines Update
[Re: VCODE]
#3132259
03/25/23 06:17 PM
03/25/23 06:17 PM
|
Joined: Jan 2003
Posts: 4,760 Moved to N.E. Tennessee
GomangoCuda
master
|
master
Joined: Jan 2003
Posts: 4,760
Moved to N.E. Tennessee
|
Ring Gear # 2070225 3.91-1 MS291 8-4-69 Pinion # 2881460 3.91 3-6-69 10 Spline 7290 Yoke
Off Topic but is it common for the dates on the ring and pinion to be that far apart?
In theory, there is no difference between theory and practice. In practice, there is.
|
|
|
Re: Pinion Gear Splines Update
[Re: GomangoCuda]
#3132279
03/25/23 06:54 PM
03/25/23 06:54 PM
|
Joined: Jan 2006
Posts: 2,386 White Plains, NY
VCODE
OP
top fuel
|
OP
top fuel
Joined: Jan 2006
Posts: 2,386
White Plains, NY
|
Ring Gear # 2070225 3.91-1 MS291 8-4-69 Pinion # 2881460 3.91 3-6-69 10 Spline 7290 Yoke
Off Topic but is it common for the dates on the ring and pinion to be that far apart? That's what I am asking. I though the ring & pinion where matched sets made together.
Mom & Dad let me buy a brand new 70 Challenger R/T 440 Six-Pack Super Trac Pack when I was 17
(Robert what is a 440 Six-Pack)
|
|
|
Re: Pinion Gear Splines Update
[Re: VCODE]
#3132287
03/25/23 07:09 PM
03/25/23 07:09 PM
|
Joined: Sep 2012
Posts: 39 West Central Indiana
PROSTOCKTOM
member
|
member
Joined: Sep 2012
Posts: 39
West Central Indiana
|
Ring Gear # 2070225 3.91-1 MS291 8-4-69 Pinion # 2881460 3.91 3-6-69 10 Spline 7290 Yoke
Off Topic but is it common for the dates on the ring and pinion to be that far apart? That's what I am asking. I though the ring & pinion where matched sets made together. The dates are made into the parts at the time of manufacturing. Ring and pinions are then put together in a machine and lapped as a set. You'll probably never see a set that have both matching dates the same on the ring and the pinion. Tom
Last edited by PROSTOCKTOM; 03/25/23 07:09 PM.
Molnar Technologies Full Service Dealer - Crankshafts & Connecting Rods
|
|
|
Re: Pinion Gear Splines Update
[Re: PROSTOCKTOM]
#3132292
03/25/23 07:16 PM
03/25/23 07:16 PM
|
Joined: Jan 2006
Posts: 2,386 White Plains, NY
VCODE
OP
top fuel
|
OP
top fuel
Joined: Jan 2006
Posts: 2,386
White Plains, NY
|
Ring Gear # 2070225 3.91-1 MS291 8-4-69 Pinion # 2881460 3.91 3-6-69 10 Spline 7290 Yoke
Off Topic but is it common for the dates on the ring and pinion to be that far apart? That's what I am asking. I though the ring & pinion where matched sets made together. The dates are made into the parts at the time of manufacturing. Ring and pinions are then put together in a machine and lapped as a set. You'll probably never see a set that have both matching dates the same on the ring and the pinion. Tom Ok Thanks, That clears that up.
Mom & Dad let me buy a brand new 70 Challenger R/T 440 Six-Pack Super Trac Pack when I was 17
(Robert what is a 440 Six-Pack)
|
|
|
|
|