Discussion of built driveline

[thereverendbill]

This thread? http://forums.amceaglesden.com/index.php?topic=25422.0
How big is the difference in speedometer function between OBDI and OBDII?

To be honest I haven't a clue, I think there is alot more wiring and another computer just for the trans. I know that my 98 bravada (OBD 2) has like 5 computers in it total and I hate it with a passion

[mick]

I've been told that the '97+ 8 1/4 axles had 29 spline shafts and are more desirable? Is this true? There's a '98 8 1/4 available for half the cost of the <'95 units, but it's a 2.5-3 hour drive. The fuel cost will make up the price difference, but are the later axles worth my trouble?

It all depends on the cost of the axles.  Half the cost...are we talking $200vs$400?  If so, can you travel 3hrs away and back for less than $200?  I would like the increased spline count, but not for the $200 difference. IMO

[The Dark Side of Will]

lol... Not even close... $75 +4-5 hrs drive time vs $150 +1 hr

It's not the money, it's the splines 

[The Dark Side of Will]

This thread? http://forums.amceaglenest.com/index.php?topic=25422.0
How big is the difference in speedometer function between OBDI and OBDII?

To be honest I haven't a clue, I think there is alot more wiring and another computer just for the trans. I know that my 98 bravada (OBD 2) has like 5 computers in it total and I hate it with a passion

For instance, GM speedometer cables turned 1000 revolutions every mile. When GM went to gear driven VSS, the sensor turned 1000 revs/mile, but made two pulses per rev and put out 2000 pulses per mile.

For a bunch of later hardware, GM switched to a magnetic reluctor and has used counts from 14000 to 24000 pulses per mile.
I was wondering if you knew that sort of info.

Finally, on the newest ('04+) cars, the instrument panel gets all its info from the data bus and there is no direct wiring for any of the instruments.

Obviously the thread I linked is an '89 Cherokee which still used the speedometer cable.

Really, I was just curious to see if the signal info was out there. Fundamentally, it doesn't *really* matter what kind of signal the speedometer likes, as I will be able to tune the pulse count that the ECM generates to drive the speedo.

[hypereagle]

  definitly replace the rear diff. Broke 3 axles with the 360. Front axles and diff held up OK.

[The Dark Side of Will]

I had located a 29 spline 8.25 with 3.55 gears locally for $75.
I went to get it today along with three sets of disks from Grand Cherokees. After i got the 8.25 out of the truck, I noticed an '87 Wagoneer in the crush row. I went to look at it and it had a Dana 44. Sweet! I cleaned up the tag and found it was a 3.54. For realz?! I talked to the yard manager about it. He said that because the truck was in the crush row, he'd let me have the D44 for the same price we'd agreed to for the 8.25. Awesomez!

So I snagged a 3.54 Dana 44 that will be very close to bolting in for $75 + the time it took to pull three sets of disks and two axles.

One of the GC's we were pulling disks from had a D44, but it had C-clips. The one I grabbed did not appear to have C-clips. When did they go to C-clips?

The GC D44's appeared to have very similar disks to the D35's.
What disks will I need to swap the '87 D44 I grabbed over to disks?

[The Dark Side of Will]

I found this page about putting the newer disks on the older D44 axle:

http://www.pirate4x4.com/tech/billavista/Disc_brakes/index.html

[IowaEagle]

Sounds like a really good day at the boneyard.

[shaggimo]

The D44 went to c clip on I believe the grand cherokee only. Kinda went along with the aluminum housing deal. Good score on the D44 though, I found one a couple weekends ago at my local u pull it  . It's going in my cherokee though, the eagle will eventually get the 8.25 out of it, lol.

[The Dark Side of Will]

Heh... Yeah, I'll have an unbreakable rear axle, but a stock D30 front diff. I'll have a Dana Difference of 46% from front to rear!

[The Dark Side of Will]

So here are some pictures:

1987 Wagoneer Dana 44 axle after removal of the drum brakes, but before cleaning


Axle after pressure washing in the quarter car wash


Original drum brakes


Dana 44 disk brake caliper brackets from late '90's Grand Cherokee


The idea is to machine the later caliper brackets to bolt onto the earlier axle housing. That may get done this week.
Most of the dirt came off with the pressure washer, however there's still some tough stuff on the axle. I will hit it with a wire brush on an angle grinder to finish mechanically cleaning it. I'll then prepare the surface for POR-15 according to the manufacturer's instructions. I'll follow that up with the same company's chassis coat black.

[The Dark Side of Will]

I just posted a new topic elsewhere ( http://forums.amceaglesden.com/index.php?topic=33648.0 ) about finding the right brake master cylinder to use with rear disks.

Suggestions?

[The Dark Side of Will]

What speedometer gear do the 4 cyl Eagles have? Do the 3.54 cars have the same drive gear as the 2.73 cars? Should I only have to change the driven gear?

I'm going to be driving the car with the mechanical speedometer for at least a little while before I can swap the 4.0 in and try to convert to an electronic speedometer.

[The Dark Side of Will]

Oops... just realized I hadn't updated this thread.

Modified caliper brackets:

[/quote]

[The Dark Side of Will]

What series of U-joints to Eagles use in the driveshafts?