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Old 09-12-2019, 08:43 AM   #1
Mini-Skoolie
 
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Source for ring and pinion

IM at my end here guys, getting really pissed by the absence of answers to a simple request. Everyone I call... I get a "Uuuuuuuh" . I have a F155S. It has a 4.33 I need something closer to a 3.33. Im not worried about power. I just need to know where to get the ring and pinion.
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Old 09-12-2019, 10:06 AM   #2
Skoolie
 
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Which Rearend

Which differential brand and model do you have?

Ive got a ring and pinion for a Dana-Spicer N190 which will fit the N175, N190, N210, N340 and N400, these all use the same ring and pinion.

Im trying to sell my set which is a 3.91.
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Old 09-12-2019, 10:14 AM   #3
Mini-Skoolie
 
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Spicer F155S
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Old 09-12-2019, 10:19 AM   #4
Skoolie
 
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I found my gear set by finding the Navistar part number then cross referencing to a Spicer/Dana gear number.

You might start by looking for the chassis manufacturer's gear part number.
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Old 09-12-2019, 10:23 AM   #5
Mini-Skoolie
 
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I called Dana, they make NO gear smaller then a 4.33 for a F155S. They told me to try an aftermarket company... I paused for a second and responded, "The name of your site is danaaftermarket.com!"

I currently have the 039KG100-X ring and pinion in my diff. its only compatible with the F155S and F170S.
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Old 09-12-2019, 12:29 PM   #6
Bus Crazy
 
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Quote:
Originally Posted by FamilyCircus View Post
Which differential brand and model do you have?

Ive got a ring and pinion for a Dana-Spicer N190 which will fit the N175, N190, N210, N340 and N400, these all use the same ring and pinion.

Im trying to sell my set which is a 3.91.

What does it take to install this gearset? Some older axles required pre-load, shims, and a lot to properly install the gears. Are these more installation friendly? In other words, something do-able in a driveway?
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Old 09-12-2019, 12:38 PM   #7
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try calling weller truck parts with the ID tag info from your axles.. these guys specialize in axles / ring and pinions, rear diff, etc..



im actually working with them now on repairing / regearing my 1978 Superior which has an RA39 axle
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Old 09-12-2019, 12:48 PM   #8
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Quote:
Originally Posted by Necro View Post
IM at my end here guys, getting really pissed by the absence of answers to a simple request. Everyone I call... I get a "Uuuuuuuh" . I have a F155S. It has a 4.33 I need something closer to a 3.33. Im not worried about power. I just need to know where to get the ring and pinion.
3.33 is insanely high. I've got 3.42 with 10R's and its too high. I want 11R's but would have to regear.
If you can't find it through vanderhag's or some similar company you may have to settle for what you can get. I'd go no higher than 3.70ish, but good luck to you man.
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Old 09-12-2019, 01:05 PM   #9
Bus Crazy
 
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I agree that 3.33 is insanely high - unless you have a legitimate, specific need for that ratio. Something like that in the Big Rig world wouldn't be out of line, but then again, those motors are happy purring along at 1200-1400 RPM The medium duty engines most of our buses have will be much happier at higher RPM's, at least under any load.
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Old 09-12-2019, 01:24 PM   #10
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Quote:
Originally Posted by Necro View Post
I called Dana, they make NO gear smaller then a 4.33 for a F155S. They told me to try an aftermarket company... I paused for a second and responded, "The name of your site is danaaftermarket.com!"

I currently have the 039KG100-X ring and pinion in my diff. its only compatible with the F155S and F170S.
You may not find an aftermarket ring and pinion with higher gearing. If that axle has a removable carrier you may need to swap out the entire carrier to get a higher geared ring and pinion.

Ted
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