Jacobs Ignition and Final Drive Installation

[john wright]

That a valid NAPA number, I just got one to put in.

J.R. Wright

>
> Thanks to all for the response on the Jacobs ignition upgrade. Now I am really
> kind of excited about getting it here.
>
> Has anyone tackled the removal and replacement of the final drive. I don't
> need comparision info about the various units available, just generic feedback
> on the degree of difficulty that is involved. Do the output shafts have to be
> removed? Special tools required? Cinnabar charges for 3 hours I think.
> Comments, por favor.
>
> Also, does anyone have a non-NAPA part number for the engine (water) temp
> sending unit that more accurately depicts the temperature scale at the guage.
> An old GMCMM hint listed it as a NAPA TS 6469. We don 't have NAPA around
> here, and no one can cross ref this item. Gracias. Larry Nelson, PB-75,
> Springfield, MO

 

[john wright]

I just had a 3.55 final drive installed at Buskirks in Late October.
Took 2 guys about an hour and 40 min. and yes they had their own special
tools to do the job quickly. These guys do alot of these and they know
what to look for when R&R the drive.

J.R. Wright
GMCGreatlaker
77 Eleganza II
Michigan

>
> In a message dated 2/16/99 6:21:15 PM Eastern Standard Time,

>
> > Cinnabar charges for 3 hours I think.
>
> Hi Larry!
> I have a Motors Parts and Labor book- Final drive ass'y remove and replace
> 2.7 hrs.
>
> >Do the output shafts have to be removed? Special tools required?
>
> The output shafts have to be unbolted, I don't think they have to be removed
> totally-
> however lets wait to see other posts. No special tools are required except if
> you are going to rebuild it yourself. It has such an odd shape and pretty
> heavy, so you have to be extremely careful.
>
> Adohen Scott
> Nehoda (Odds and Ends site)

 

[philip l. stewart]

>
> Has anyone tackled the removal and replacement of the final drive. I don't
> need comparision info about the various units available, just generic feedback
> on the degree of difficulty that is involved. Do the output shafts have to be
> removed? Special tools required? Cinnabar charges for 3 hours I think.
> Comments, por favor.

Larry, Emery is correct. My experience was that socket needed to unbolt
drive axle flanges from the Final drive was a 7/16" 12-point sold at
Sears and many other places.

Another handy tool is a shop service jack (aka floor jack) to raise and
lower the final drive once you've got it unbolted. The final drive is
heavy.

It took me most of the weekend to take out the OEM 3.07 and install a
3.42 last summer, but I did everything very slowly. If you can find a
service facility that will do the work for you for the 3 to 4 hours it
appears it should take, then I would recommend that route to you.

Somewhere in the Archives I did a more detailed post on this subject
last year, but I couldn't tell you where to find it. BTW, Netters, what
ever became of the project to develop a search engine for the Archives?

Phil Stewart
'76 Transmode, TN