Superduty D50 tech - Pirate4x4.Com : 4x4 and Off-Road Forum

takotruckin · 03-10-2012, 07:11 PM

So today I sheared the front pinion on my 2000 F250, 7.3L 35's and 3.73 gears. I assume the abuse I have put it through weakened it and today just wasn't its day, I gave it a little throttle up a rock and it popped and the drive shaft hit the ground

How do I keep it from happening again? Will a lower gear ratio help prevent it or do I need to look at swapping in a 60?

And no, I don't want to quit wheeling my Superduty.

u2slow · 03-10-2012, 08:10 PM

I'd put in the 60. Housing, r&p, carrier, and inner shafts. You can recycle your outers since they are the same anyways.

Harold Phipps · 03-11-2012, 08:45 AM

And yes, change gear ratio.

takotruckin · 03-11-2012, 06:40 PM

Would just going to 4.56 gears prevent this failure from happening by relieving stress on the pinion or would it not help that much?

LOGANSTANFORTH · 03-11-2012, 07:08 PM

I have seen this alot, I would suggest going to a 60...

takotruckin · 03-11-2012, 08:26 PM

After looking at the gear calculator the current plan is to find a 4.30 60 and then swap in a set of 4.30s and a truetrac in the rear

03-10-2012, 07:11 PM	#1 (permalink)
takotruckin Granite Guru Join Date: Jan 2008 Member # 106178 Location: Fresno Ca Posts: 529	Superduty D50 tech So today I sheared the front pinion on my 2000 F250, 7.3L 35's and 3.73 gears. I assume the abuse I have put it through weakened it and today just wasn't its day, I gave it a little throttle up a rock and it popped and the drive shaft hit the ground How do I keep it from happening again? Will a lower gear ratio help prevent it or do I need to look at swapping in a 60? And no, I don't want to quit wheeling my Superduty. Last edited by takotruckin; 03-10-2012 at 07:15 PM.

03-10-2012, 08:10 PM	#2 (permalink)
u2slow Registered User Join Date: Apr 2001 Member # 4243 Location: Salt Spring Island, BC Posts: 3,068	I'd put in the 60. Housing, r&p, carrier, and inner shafts. You can recycle your outers since they are the same anyways. __________________ 90-93 CTD jalopies

03-11-2012, 06:40 PM	#4 (permalink)
takotruckin Granite Guru Join Date: Jan 2008 Member # 106178 Location: Fresno Ca Posts: 529	Would just going to 4.56 gears prevent this failure from happening by relieving stress on the pinion or would it not help that much? Last edited by takotruckin; 03-11-2012 at 06:40 PM.

03-11-2012, 07:08 PM	#5 (permalink)
LOGANSTANFORTH Rock God Join Date: Aug 2009 Member # 140580 Location: LAKELAND FL/WISHING I WAS IN IRAQ... Posts: 1,877	I have seen this alot, I would suggest going to a 60... __________________ 1996 DODGE 2500, 4X4, CUMMINS, 370'S, 5GSK, MACK PLUG, STUDS, SFI FLEX PLATE, DERALE DEEP PAN, EMS HUB KIT WITH 35 SPLINE INNER AND OUTTER MOSER AXLES, WARN GOLD LOCK-OUTS, 3 IN. LEVELING KIT, DUAL EDELBROCK REMOTE RESERVOIR SHOCKS, ROUGH COUNTRY STEERING STABILIZER, STEERING BOX BRACE.

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03-11-2012, 08:45 AM	#3 (permalink)
Harold Phipps Rock God Join Date: Feb 2009 Member # 130003 Location: Polk City, Iowa Posts: 1,422	And yes, change gear ratio.

03-11-2012, 08:26 PM	#6 (permalink)
takotruckin Granite Guru Join Date: Jan 2008 Member # 106178 Location: Fresno Ca Posts: 529	After looking at the gear calculator the current plan is to find a 4.30 60 and then swap in a set of 4.30s and a truetrac in the rear