Need a measurement

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Need a measurement

Postby Mr_Roboto [OP] » March 26th 2020, 2:17am

Can someone out there with a RWD get me the distance between the top of the tail shaft where the output seal is to the floor pan of the van? I'm trying to see if I need to make a spacer for my trans crossmember. I think that everything is hanging slightly low right now and could really use throwing an inch under it to get some more exhaust clearance.
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Re: Need a measurement

Postby 81SAFARIMATT » March 26th 2020, 3:20pm

ok tranny comes back.... then a round piece at end of tranny then the u joint on drive shaft ...then the drive shaft for a few inches is thinner then it gets fatter the rest of the way back.... that is what i am looking at

i measured just behind the u joint on the thinner part of the drive shaft and from top of driveshaft to floor pan was 7 1/4 inches

1998 Safari RWD

hope that helps
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Re: Need a measurement

Postby Mr_Roboto [OP] » March 26th 2020, 3:55pm

Thanks for the info. Here's a pic of what I have. Need to measure but I'm betting I'm about 2" low
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Re: Need a measurement

Postby 81SAFARIMATT » March 26th 2020, 4:30pm

6 inches ....maybe a hair over ....Matt
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Re: Need a measurement

Postby Mmusicman » March 26th 2020, 6:09pm

I find this discussion interesting in the fact I was just looking at my stock drive-line on my 92 (last night)... and for the first time I think my trans might be sitting a tad low. I haven't actually looked at it carefully enough, but it is sitting in stock mounts in stock location. There are proper trans > drive-shaft > pinion angles... which would concern me most. I need to take some actual measurements.

Ideally, the trans angle should be complimentary to the pinion... same as pinion angle.

I had to space my NP233 transfer case up quite a bit to get better output angle.. but I attribute this to the 233 being smaller than the stock AWD case... which caused it to sit lower.

Here is how I spaced mine (on my 2000)

20181027_175111.jpg


A couple photo suggestions regarding angles:

pinion trans angle 01.jpeg
pinion trans angle 01.jpeg (38.01 KiB) Viewed 354 times

It should probably be noted (in next photo) that "perfect inline" is not actually considered best.
Ideal is considered to be more like 1-3 degree matching angles (like 2nd illustration)..

Driveline pinion angles 01.JPG


SIDENOTE: If you have a level edge on you phone (remove from case)... I found it to offer quite accurate results with a good app. Surprisingly, it can give you measurements in the decimal 1/10th's of a degree angles (or even 1/1000th's with utility app)... far more accurate than my actual angle too. :D

Here are two screen shots (from my phone)
1) is a simple "bubble" app (I use this often)
2) is more complex utility app (reads actual sensor data)

Screenshot_20200326-133429_.jpg
Last edited by Mmusicman on March 26th 2020, 6:47pm, edited 3 times in total.
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Re: Need a measurement

Postby AstroWill » March 26th 2020, 6:27pm

81SAFARIMATT wrote:6 inches ....maybe a hair over ....Matt


That's probably the average.

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Re: Need a measurement

Postby Mr_Roboto [OP] » March 26th 2020, 6:38pm

I have a mag angle gauge. I'll probably take some measurements today but looking at it as per the floor level I'm about 1.5" low. That's good because that should net me a lot of clearance on the exhaust that I don't have right now.
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