where to find 4.88's for h190

[mr68gts]

I've been scratching my head trying to match the ratios in my 4x4 620 so I can use 4 wheel drive on the road here in North east AZ where we get snow and I need it. (this way the Dana 20 transfer case don't end up on the ground haha!) I can get a 4.88 for the Dana 30 up front, but where do i locate the 88's for the H190 that came stock in my 76 620? THE 4.88's will actually work better anyway with the 33" tires I currently have on the truck. (or was there even 4.88's that would fit? unless I can find a 4.10 from something else to fit lol)

thanks

Paul

[thisismatt]

38100-Y4006 would be a 4.875 for a 09.79 - 03.83 720 truck H190. I'm not sure if that would work for your 620, though, since I believe there are different H190 diffs

[datzenmike]

38100 14900

38100 20659

38100 20600...

 

Are all 39 crown/8pinion 4.875 ratio gear sets from the 521 with J13 motor.

 

Matt I don't think there were any 4.875 used in the 620. The early L16 automatics were 4.625 but I think that was it. No 720 uses a set that high.

[mr68gts]

Mike,

 

The 521's had an H190 rear end in them? Hmmm I learned something new today. Guess my day is done ha ha. Now are these part numbers still available through Nissan or only used. (we don't even have a Nissan up here. Closest one is Phoenix or Albuquerque!) Thanks for the info.

Paul

[datzenmike]

Yes and so did the 810 Maxima wagon, the '82-'83 200sx, the original 510 wagon, the Roadster and earlier trucks like the 411, 320.

[datsunaholic]

H190 4.88s were the only ratio used in '66-69 520s and 521s. They were also a common but not exclusive ratio in 72-73 620s. Some have 4.375s, which you already have.

 

My 4X4, I'm going the other way. I don't want 4.88s because it makes it undriveable on the freeway without a 280ZX 5-speed, and that 5-speed doesn't have the proper 1st gear for a truck. Since I don't use 4WD on dry pavement I'll just put 4.11s in the back, which are fairly close to the 4.10s in front. Right now the 4.10/4.375 difference is ridiculous. But works in mud and snow.

 

Problem is I don't have a set of 4.11s.

[]2eDeYe]

Problem is I don't have a set of 4.11s.

 

What?? There is a Datsun part you don't own? :lol:

[datsunaholic]

Well, sure I don't. I don't own a cast-iron U67 head, the guy that had it wanted $300 for it. I also don't own a single Roadster-specific part. Err, well, I do have a Roadster diff but it's had truck side gears swapped in.

 

I do own a 4.11, but it's installed in my '79. Should have said I don't have an EXTRA 4.11.

[Charlie69]

I've been scratching my head trying to match the ratios in my 4x4 620 so I can use 4 wheel drive on the road here in North east AZ where we get snow and I need it. (this way the Dana 20 transfer case don't end up on the ground haha!) I can get a 4.88 for the Dana 30 up front, but where do i locate the 88's for the H190 that came stock in my 76 620? THE 4.88's will actually work better anyway with the 33" tires I currently have on the truck. (or was there even 4.88's that would fit? unless I can find a 4.10 from something else to fit lol)

thanks

Paul

 

 

I have a used 66 520 4.875 rearend in SW Phoenix $50 local pickup only. Pm me if interested

[mklotz70]

The 320's also had the 4.88's in them...just have to swap the side gears since the splines don't match the later trucks.