Is dana 70 from an 89 same as a 93 W250 - Dodge Diesel

Domek · 12-16-2009, 12:46 PM

My 93 club cab W250 2wd read diff dana 70 just went out on me for lack of lube.

At this point a buddy of mine has differential from an 89 3/4 ton. He's not so sure about the gears but I know that I got 3.50 on the dana 70, it says on the hood sticker.

My questions are the followings:

does it fit under my 93 as a bolt on?

do I need to relocate springs?

I am new to this dodge thing, so any help will be appreciated.

Another friend of mind found me a 93 dually, which I have not check yet.

same question as above plus do they run an 8 bolt pattern or 10 bolt?

any help will be appreciated.

Mcmopar · 12-16-2009, 01:26 PM

Quote:

Originally Posted by Domek

My 93 club cab W250 2wd read diff dana 70 just went out on me for lack of lube.

At this point a buddy of mine has differential from an 89 3/4 ton. He's not so sure about the gears but I know that I got 3.50 on the dana 70, it says on the hood sticker.

My questions are the followings:

does it fit under my 93 as a bolt on? Single rear wheel to SRW, it should

do I need to relocate springs?NO

I am new to this dodge thing, so any help will be appreciated.

Another friend of mind found me a 93 dually, which I have not check yet.Dually rears are different, wheel mounting surface to WMS

same question as above plus do they run an 8 bolt pattern or 10 bolt?Al Dodge 250, 350's run an 8 X 6.5" bolt circle, eve in the new trucks.

any help will be appreciated.

See my comments in RED

Domek · 12-16-2009, 01:30 PM

Well thanks Mcmopar, I really appreciate the answer

another question:

Is the differential under the 89 also a D70?

or is it something else?

freight train · 12-16-2009, 04:25 PM

^ its a D70 if it a 3.54 or higher rear. If its a 3.07 its a Dana 71. You didnt state what ratio the 89 rear ratio is! If it was a auto truck it came with a 3.07 ratio D71. I would assume your 93 D250 (not a W250) came with 3.54 as you stated. The 89 rear housing is different than your D70. You cant simply swap gears. I am pretty sure! The entire rears will swap from one truck to the other no problem. The true question is do you pull with your truck? Anyone ever had a 3.07 rear with a 4spd auto? To much gear?

dodgenstein · 12-16-2009, 04:29 PM

The first three gears are the same ratios in a 727 and a 518, so at equal power they will pull the same. OD could be locked out if EGT's get too high. 3.07's and light towing shouldn't be a problem if you have gauges.

Domek · 12-17-2009, 08:32 AM

Quote:

Originally Posted by freight train

^ its a D70 if it a 3.54 or higher rear. If its a 3.07 its a Dana 71. You didnt state what ratio the 89 rear ratio is! If it was a auto truck it came with a 3.07 ratio D71. I would assume your 93 D250 (not a W250) came with 3.54 as you stated. The 89 rear housing is different than your D70. You cant simply swap gears. I am pretty sure! The entire rears will swap from one truck to the other no problem. The true question is do you pull with your truck? Anyone ever had a 3.07 rear with a 4spd auto? To much gear?

Kind of confusing statements

:

I don't know what kind of tranny, neither gears on the 89 diff. I 'll have to assume is stick tranny. ...and I believed my friend said it had 4.10

:

Quote:

Originally Posted by freight train

^The 89 rear housing is different than your D70. You cant simply swap gears. I am pretty sure! The entire rears will swap from one truck to the other no problem.

I got a few questions on this statement.
it's my understanding that d70 and d71are different
...That the gears from the 89 won't fit on my D70. Am I correct?

It's my understanding that the whole differential(89) will be a bolt on under my truck as an entire unit.
Am I correct?

Quote:

Originally Posted by freight train

^Do I pull w/ my truck?

Yes indeed, A gooseneck trailer w/ a 79 Land Cruiser about 5000 Lbs.

12-16-2009, 04:25 PM	#4
freight train Registered User Join Date: Dec 2008 Location: Martinsburg WV Posts: 1,116 My Photo Gallery My Classified Ads	^ its a D70 if it a 3.54 or higher rear. If its a 3.07 its a Dana 71. You didnt state what ratio the 89 rear ratio is! If it was a auto truck it came with a 3.07 ratio D71. I would assume your 93 D250 (not a W250) came with 3.54 as you stated. The 89 rear housing is different than your D70. You cant simply swap gears. I am pretty sure! The entire rears will swap from one truck to the other no problem. The true question is do you pull with your truck? Anyone ever had a 3.07 rear with a 4spd auto? To much gear? __________________ 2005 3500, 4x4, 6spd, some mods:) 1992 Dodge CC, W350, 4X4, 5spd, Dually. 60mm compressor, 16cm housing, tweaked pump, bigger injectors, ASA cold air intake, Ranch Hand headache rack, Banks intercooler, straight DE 4" exh. Heavy duty front bumper, Ranch Hand rear bumper, Red canyon sport grille, Mag-hytec D70 cover, Isspro guages EGT,Pyro,tach, NV4500 conversion 1992 Dodge Ramcharger 4x4, Canyon Sport Cummins/ nv4500, with way to much to list Six in a row makes it go! HELL YEAH

12-16-2009, 04:29 PM	#5
dodgenstein Registered User Join Date: Nov 2002 Location: Hamilton,MO Posts: 566 My Photo Gallery My Classified Ads	The first three gears are the same ratios in a 727 and a 518, so at equal power they will pull the same. OD could be locked out if EGT's get too high. 3.07's and light towing shouldn't be a problem if you have gauges. __________________ Of course it smokes, it's a diesel, Einstein!!

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12-16-2009, 01:30 PM	#3
Domek Registered User Join Date: Jun 2009 Posts: 6 My Photo Gallery My Classified Ads	Well thanks Mcmopar, I really appreciate the answer another question: Is the differential under the 89 also a D70? or is it something else?

12-17-2009, 08:32 AM