| Slant Six Forum https://www.slantsix.org/forum/ |
|
| Is a 2352938 ring gear for a 7 1/4 or 8 1/4 rear? https://www.slantsix.org/forum/viewtopic.php?t=50462 |
Page 1 of 1 |
| Author: | DonPal [ Fri Nov 30, 2012 3:33 pm ] |
| Post subject: | Is a 2352938 ring gear for a 7 1/4 or 8 1/4 rear? |
I bought a new ring and pinion advertised to fit a 7 1/4. After removing the wax I found the ratio stamped at 3.21 not 3.23. Now I'm thinking the advertisement was wrong & it's for an 8 1/4. The ring gear has 2352938 part number stamped on it. Can anyone confirm it's true identity before I tear down my 7 1/4 rear & it doesn't fit. How do you measure a ring gear to check for 7 1/4?.....to the OD? to the center of the teeth? Thanks.........Don |
|
| Author: | Doc [ Fri Nov 30, 2012 4:08 pm ] |
| Post subject: | |
Measure across the OD of the ring gear... DD |
|
| Author: | DusterIdiot [ Fri Nov 30, 2012 5:44 pm ] |
| Post subject: | Grime... |
2852938 is for an 8 1/4" 3.21 ring gear 2352938 is an early part number almost early 60's-ish...is there some grime making the 285 a 235 maybe? Time to break out the tape measure as Doc says. -D.Idiot |
|
| Author: | DonPal [ Sat Dec 01, 2012 2:29 am ] |
| Post subject: | |
Extreme O.D. of gear.....right out to tip of teeth...measures 8 5/8. After closer scrutiny & more wax peeling the part number is a 2852938. The pinion might give a hint if the ring gear doesn't with numbers: 35079 5 3 21 with a bearing stem dia of 1 1/2 dia. (definitely not 1 3/8!) It has the MOPAR pentastar stamped in it So based on the OD measurement I better not tear into my 7 1/4 yet! My 65 parts manual shows numbers like 2467 326 for a Dart 3.23 pinion/gear set with or without sure grip......I wonder why they don't show individual ring gear numbers for the Dart/Valiant? That same manual also shows the 65 B & C bodies to have an 8 3/4 with 3.23 ring gear 2070 816 Consequently based on the OD & part number this could be a later 8 1/4 or 8 3/4 ring gear? Thanks for the responses........Don |
|
| Author: | DusterIdiot [ Sat Dec 01, 2012 9:11 am ] |
| Post subject: | 8 1/4"? |
Quote: The pinion might give a hint if the ring gear doesn't with numbers:
According to the 1973 Parts Manual the stem size on 8 1/4" are 1 5/8" and 8 3/4" are 1 7/8"35079 5 3 21 with a bearing stem dia of 1 1/2 dia. (definitely not 1 3/8!) It has the MOPAR pentastar stamped in it Pinion # for a 3.21 is:3507915 or 3723044 So it looks like you have an OEM 3.21 set for an 8 1/4" -D.Idiot |
|
| Author: | DonPal [ Sat Dec 01, 2012 11:13 am ] |
| Post subject: | 2852938 ring gear and 3507915 pinion is for 8 1/4 |
Summary: Based on the part numbers & ratio on both ring gear & pinion and your research it looks like a sure fire 3.21 ratio 8 1/4 with the smaller pinion stem diameter. Thanks to your help I now know what to do....and it sure means for me....don't touch that 7 1/4 rear yet. I altered the title so if someone is researching the same part numbers the'll have your research Thanks..Don |
|
| Page 1 of 1 | All times are UTC-08:00 |
| Powered by phpBB® Forum Software © phpBB Limited https://www.phpbb.com/ |
|