3 Speed Overdrive - Page 2 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**NewBayColony** · 11-19-2018, 03:12 PM

Thanks for the responses. Now I have another question. Is the linkage available for the 4 bolt that works on a 72?
This may sound odd but I kinda want the non sincro first. i had plenty of them plus I've driven tractor trailer for 40 years. One non sincro gear is a breeze.

57Suburb · 11-19-2018, 03:17 PM

Quote:

Originally Posted by NewBayColony

Thanks for the responses. Now I have another question. Is the linkage available for the 4 bolt that works on a 72?
This may sound odd but I kinda want the non sincro first. i had plenty of them plus I've driven tractor trailer for 40 years. One non sincere gear is a breeze.

LOL, I'll have some linkage available soon.

**NewBayColony** · 11-19-2018, 03:27 PM

Wow, cool.

**NewBayColony** · 11-23-2018, 11:59 AM

OK 57 Suburb, I bought the tranny, will you have the linkage? Thanks, Jeff

57Suburb · 11-23-2018, 04:42 PM

Quote:

Originally Posted by NewBayColony

OK 57 Suburb, I bought the tranny, will you have the linkage? Thanks, Jeff

Yes, I'm about ready to pull the old motor/tranny. Was hoping to get it done this weekend, but some things have come up, so might be a week or two.

**NewBayColony** · 11-23-2018, 06:05 PM

Don't worry about the time. Just happy to know you have the linkage. It's gonna be awhile till I can install everything anyway. I just wanted to let you know what was up. Hope you had a good Thanksgiving. Thanks, Jeff

**NewBayColony** · 12-26-2018, 03:03 PM

Quote:

Originally Posted by 57Suburb

Yes, I'm about ready to pull the old motor/tranny. Was hoping to get it done this weekend, but some things have come up, so might be a week or two.

Hello 57Suburb. Hope you had a great Christmas. Just wondering if you had a chance to do anything about that linkage for the 4 bolt Muncie 319? Thanks, Jeff

geezer#99 · 12-26-2018, 03:35 PM

Quote:

Originally Posted by NewBayColony

OK 57 Suburb, I bought the tranny, will you have the linkage? Thanks, Jeff

Did you get a bellhousing too?
Bearing retainer is bigger on a non synchro trans.

57Suburb · 12-26-2018, 05:38 PM

Quote:

Originally Posted by NewBayColony

Hello 57Suburb. Hope you had a great Christmas. Just wondering if you had a chance to do anything about that linkage for the 4 bolt Muncie 319? Thanks, Jeff

In San Antonio right now for a bowl game. Hoping to get something done when I get back.

**NewBayColony** · 12-27-2018, 01:36 AM

Quote:

Originally Posted by geezer#99

Did you get a bellhousing too?
Bearing retainer is bigger on a non synchro trans.

I did not get the bell housing. Didn't realize I needed it. The guy I bought the transmission from has one. Is the throw out bearing fork different? Thanks!

**NewBayColony** · 12-27-2018, 01:38 AM

Quote:

Originally Posted by 57Suburb

In San Antonio right now for a bowl game. Hoping to get something done when I get back.

Not a problem. I just wanted to know if I needed to start looking somewhere else. Thanks!

geezer#99 · 12-27-2018, 10:46 AM

Quote:

Originally Posted by NewBayColony

I did not get the bell housing. Didn't realize I needed it. The guy I bought the transmission from has one. Is the throw out bearing fork different? Thanks!

It’s the transmission bearing retainer that’s a different size.
The older trans has one that is about 5 1/8 inches in diameter.
Your present tranny likely has one that is about 4 7/8 inches.
The bearing retainer fits snugly into the big hole in the bell housing.
Easy to measure the o/d tranny.
You might need the other bell housing.

**NewBayColony** · 12-27-2018, 11:02 AM

Quote:

Originally Posted by geezer#99

It’s the transmission bearing retainer that’s a different size.
The older trans has one that is about 5 1/8 inches in diameter.
Your present tranny likely has one that is about 4 7/8 inches.
The bearing retainer fits snugly into the big hole in the bell housing.
Easy to measure the o/d tranny.
You might need the other bell housing.

Got it! Thanks.

geezer#99 · 12-27-2018, 11:51 AM

Another thought!
The other bellhousing might not work with your present flywheel/clutch assembly.
There’s big and small ones.
Something else to keep in mind.

weim55 · 12-27-2018, 04:24 PM

The 4 bolt 3 speed was produced with both sizes of input retainer. No problem if yours is not a match for your bellhousing, used replacement should be an easy locate. Both are very common. Your '72 should have the larger diameter bellhousing input retainer hole and likely your 3 speed OD will have the smaller dia. input retainer. Another option is Novak or Advance Adaptor sells a simple sleeve to make up the difference.

Steve weim55 Colorado

**NewBayColony** · 12-28-2018, 01:07 PM

Quote:

Originally Posted by weim55

The 4 bolt 3 speed was produced with both sizes of input retainer. No problem if yours is not a match for your bellhousing, used replacement should be an easy locate. Both are very common. Your '72 should have the larger diameter bellhousing input retainer hole and likely your 3 speed OD will have the smaller dia. input retainer. Another option is Novak or Advance Adaptor sells a simple sleeve to make up the difference.

Steve weim55 Colorado

Thanks Steve. I'm in Fort Collins right now. When I get home I'll measure the overdrive transmission. The guy that I bought it from has the bell housing along with the clutch, pressure plate and flywheel. It was supposed to come with the tranny but I didn't think I would need it so I figured I would save on shipping by not taking it. I just texted him and he still has everything.
By the way, nice state you got here.

11-19-2018, 03:12 PM	#26
NewBayColony Senior Member Join Date: Mar 2017 Location: Northbridge,MA Posts: 493	Re: 3 Speed Overdrive Thanks for the responses. Now I have another question. Is the linkage available for the 4 bolt that works on a 72? This may sound odd but I kinda want the non sincro first. i had plenty of them plus I've driven tractor trailer for 40 years. One non sincro gear is a breeze. Last edited by NewBayColony; 11-20-2018 at 09:30 AM.

11-19-2018, 03:27 PM	#28
NewBayColony Senior Member Join Date: Mar 2017 Location: Northbridge,MA Posts: 493	Re: 3 Speed Overdrive Wow, cool.

11-23-2018, 11:59 AM	#29
NewBayColony Senior Member Join Date: Mar 2017 Location: Northbridge,MA Posts: 493	Re: 3 Speed Overdrive OK 57 Suburb, I bought the tranny, will you have the linkage? Thanks, Jeff __________________ 72 C20 292 3OTT 77 GMC 2500 4x4 Longstepper 350 4sp 50 3100 ex Airforce/Town of Mendon fire truck 72 GMC 1500 2wd short stepside 250 4sp 78 GMC 2500 4x Longstepper 292 4sp 54 6400 Chevy 5 window 4 sp 2sp vac rear end Shell oil truck/dump truck (Norman)

11-23-2018, 06:05 PM	#31
NewBayColony Senior Member Join Date: Mar 2017 Location: Northbridge,MA Posts: 493	Re: 3 Speed Overdrive Don't worry about the time. Just happy to know you have the linkage. It's gonna be awhile till I can install everything anyway. I just wanted to let you know what was up. Hope you had a good Thanksgiving. Thanks, Jeff __________________ 72 C20 292 3OTT 77 GMC 2500 4x4 Longstepper 350 4sp 50 3100 ex Airforce/Town of Mendon fire truck 72 GMC 1500 2wd short stepside 250 4sp 78 GMC 2500 4x Longstepper 292 4sp 54 6400 Chevy 5 window 4 sp 2sp vac rear end Shell oil truck/dump truck (Norman)

12-27-2018, 11:51 AM	#39
geezer#99 Registered User Join Date: Aug 2009 Location: Bowser Posts: 13,515	Re: 3 Speed Overdrive Another thought! The other bellhousing might not work with your present flywheel/clutch assembly. There’s big and small ones. Something else to keep in mind.

12-27-2018, 04:24 PM	#40
weim55 Registered User Join Date: Jan 2017 Location: Larkspur, Colorado Posts: 904	Re: 3 Speed Overdrive The 4 bolt 3 speed was produced with both sizes of input retainer. No problem if yours is not a match for your bellhousing, used replacement should be an easy locate. Both are very common. Your '72 should have the larger diameter bellhousing input retainer hole and likely your 3 speed OD will have the smaller dia. input retainer. Another option is Novak or Advance Adaptor sells a simple sleeve to make up the difference. Steve weim55 Colorado Last edited by weim55; 12-27-2018 at 04:31 PM.



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