The Ford Barn

CWPASADENA · 05-15-2010, 10:25 AM

Has any one ever tried to use L'32-34 Carrier Bearing Cups, in a 39 Rear end?

I recently took apart a 39 rear end and this was the case. Because of the smller L'32-'34 Cups, the ring gear was too deep into the L/H axle housing and the back side of the ring gear was rubbing on the inside of the bell. It also semed to have a bit too much back lash. It had been run some this way but made such a noise it would wake up the dead.

I guess the guy who did this did not have very high standards. As long as the car would move, that was good enough.

Anyway, I just thought I would pass this along.

Chris

2ndgeer · 05-15-2010, 12:36 PM

Chris,
Your story reminded me of another episode that involves a differential. Apologies if this is off topic. More than 50 years ago a friend of mine needed a vehicle to use in the Inyo Mountains so he could map the geology for his Master's thesis. Anyway, he bought a Model A pickup from a Japanese-American over on Sawtelle. He used it a while in the field but the rear end made a lot of noise. He took it into a garage in Big Pine. When the mechanic put it on the rack and removed the drain plug from the differential SALT WATER came out! It seems the previous owner loved surf fishing and routinely backed the pickup into the surf to fish from the bed.

Al B

bobH · 05-15-2010, 01:53 PM

Chris, My memory is fading... I 'think' that the difference in L32-34 carrier bearings, vs 35-up, is SUPPOSED to accomodate the difference in banjo widths???? I'm sure someone will correct me, if I have another case of crs.
In the case of your 39, I'd assume that someone simply screwed-up. It's hard to believe that someone would actually drive it as such, and tolerate the noise it must have made.

CWPASADENA · 05-15-2010, 04:58 PM

Bob, You are correct.

The L'32-34 narrow banjo used "18-" Part Number Carrier Bearings which are smaller then the "68-" Carrier Bearings used in the wide 37-48 rear ends. I believe the 35-36 rear axles, while the banjo was wide, the axle housings were designed to use the smaller "18-" Carrier bearings. Both the cones will press onto the ring gear and carrier but the "18-" has smaller rollers. With the ring gear so far away from the pinion, obiviously the guy was not too concerned about back lash.

After doing all the work to overhaul the differential before, the guy must have been a bit disappointed. May be that is why he sold the car???

Chris

CWPASADENA · 05-16-2010, 03:59 PM

Quote:

Originally Posted by 2ndgeer

Chris,
Your story reminded me of another episode that involves a differential. Apologies if this is off topic. More than 50 years ago a friend of mine needed a vehicle to use in the Inyo Mountains so he could map the geology for his Master's thesis. Anyway, he bought a Model A pickup from a Japanese-American over on Sawtelle. He used it a while in the field but the rear end made a lot of noise. He took it into a garage in Big Pine. When the mechanic put it on the rack and removed the drain plug from the differential SALT WATER came out! It seems the previous owner loved surf fishing and routinely backed the pickup into the surf to fish from the bed.

Al B

I can only imagine what the parts inside of the differentialhousing lookied like.

Chris

Bruce Lancaster · 05-17-2010, 10:48 AM

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So, you're saying that saltwater is not a good lubricant??

05-15-2010, 10:25 AM	#1
CWPASADENA Senior Member Join Date: May 2010 Location: PASADENA, CA Posts: 1,884	Differential bearings, have not seen this before??? Has any one ever tried to use L'32-34 Carrier Bearing Cups, in a 39 Rear end? I recently took apart a 39 rear end and this was the case. Because of the smller L'32-'34 Cups, the ring gear was too deep into the L/H axle housing and the back side of the ring gear was rubbing on the inside of the bell. It also semed to have a bit too much back lash. It had been run some this way but made such a noise it would wake up the dead. I guess the guy who did this did not have very high standards. As long as the car would move, that was good enough. Anyway, I just thought I would pass this along. Chris

05-15-2010, 12:36 PM	#2
2ndgeer Senior Member Join Date: May 2010 Location: Wichita, KS Posts: 210	Re: Differential bearings, have not seen this before??? Chris, Your story reminded me of another episode that involves a differential. Apologies if this is off topic. More than 50 years ago a friend of mine needed a vehicle to use in the Inyo Mountains so he could map the geology for his Master's thesis. Anyway, he bought a Model A pickup from a Japanese-American over on Sawtelle. He used it a while in the field but the rear end made a lot of noise. He took it into a garage in Big Pine. When the mechanic put it on the rack and removed the drain plug from the differential SALT WATER came out! It seems the previous owner loved surf fishing and routinely backed the pickup into the surf to fish from the bed. Al B

05-15-2010, 01:53 PM	#3
bobH Senior Member Join Date: May 2010 Location: so cal, placerville, vegas Posts: 1,394	Re: Differential bearings, have not seen this before??? Chris, My memory is fading... I 'think' that the difference in L32-34 carrier bearings, vs 35-up, is SUPPOSED to accomodate the difference in banjo widths???? I'm sure someone will correct me, if I have another case of crs. In the case of your 39, I'd assume that someone simply screwed-up. It's hard to believe that someone would actually drive it as such, and tolerate the noise it must have made.

05-15-2010, 04:58 PM	#4
CWPASADENA Senior Member Join Date: May 2010 Location: PASADENA, CA Posts: 1,884	Re: Differential bearings, have not seen this before??? Bob, You are correct. The L'32-34 narrow banjo used "18-" Part Number Carrier Bearings which are smaller then the "68-" Carrier Bearings used in the wide 37-48 rear ends. I believe the 35-36 rear axles, while the banjo was wide, the axle housings were designed to use the smaller "18-" Carrier bearings. Both the cones will press onto the ring gear and carrier but the "18-" has smaller rollers. With the ring gear so far away from the pinion, obiviously the guy was not too concerned about back lash. After doing all the work to overhaul the differential before, the guy must have been a bit disappointed. May be that is why he sold the car??? Chris Last edited by CWPASADENA; 05-17-2010 at 07:40 PM. Reason: TYPO and incomplete, MORE INFORMATION

05-17-2010, 10:48 AM	#6
Bruce Lancaster Member Emeritus Join Date: May 2010 Location: Madison, NJ Posts: 5,230	Re: Differential bearings, have not seen this before??? Sponsored Links (Register now to hide all advertisements) So, you're saying that saltwater is not a good lubricant??