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09-26-2011, 12:23 PM | #1 |
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$250 for switching R&P in banjo rear
I have an open drive 3:54 ring gear and pinion that I want to put in a 39 ford banjo rear. I have never done any type of rear end work and never switched the R&P before. I have read a few tech write ups on here but just dont feel confortable doing it. So I called a shop who does rear end work and they priced switching the R&P for me and it would be around $250. Does that sound reasonable?
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09-26-2011, 12:45 PM | #2 |
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Re: $250 for switching R&P in banjo rear
Maybe. 5 hours at $50/hour? From what I've seen in the Ford Service bulletins and Motor's Manuals, I wouldn't want to promise it in anything less than 5 hours. The bigger question would be: Is the shop REALLY familiar with that style rearend and will all bearing loads, clearances, and backlash be right when it's done.
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09-26-2011, 01:45 PM | #3 |
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Re: $250 for switching R&P in banjo rear
I have done a few of these and i am not sure i would do it for $250.
Dale hit the nail on the head in the respect of "does the shop know this rear axle" the kid down the street thats been building chevelles and mustangs rear axles might not be the guy for this job. We have qiote a few shops around here that could get er done and have tons of experiences with these older units...... |
09-26-2011, 02:27 PM | #4 |
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Re: $250 for switching R&P in banjo rear
I agree. This is not a job for the average shop.
I recommend you do the job, even if you're not confident. I did exactly the same thing and just followed all the procedures I could find. It's actually not difficult, just time consuming. I took about 7-8 hours. |
09-26-2011, 03:38 PM | #5 |
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Re: $250 for switching R&P in banjo rear
Why don't you R&R the rearend & just have a shop do the setup on the R&P. It's not rocket science BUT you do need to get the gears setup with the correct tolerances. Should only take them less than half the time to just set up the gears.
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09-26-2011, 03:50 PM | #6 |
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Re: $250 for switching R&P in banjo rear
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09-26-2011, 04:56 PM | #7 |
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Re: $250 for switching R&P in banjo rear
I fitted a 3.54 to my 34, it was a new reproduction gearset,
It WAS NOT as easy as setting an original ford set, The pinion depth was not right and I had to make spacers to get the contact right. Lawrie |
09-26-2011, 05:03 PM | #8 | |
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Re: $250 for switching R&P in banjo rear
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09-26-2011, 06:20 PM | #9 |
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Re: $250 for switching R&P in banjo rear
What Jim Lindner and Dale said. You'll need a dial indicator, a banjo
gasket set and some good grade grease crayon to check pinion tooth contact. A good view of what the contact should look like is in the latest Rod & Custom...the issue with the blue '32 roadster on the cover. It's sort of like everything 'Flathead'....just don't overlook the obscure details or you'll get BIT !!! Charlie ny |
09-26-2011, 08:25 PM | #10 |
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Re: $250 for switching R&P in banjo rear
What the others have advised but also setup a work bench and chain hoist or cherry picker to move the parts around. I did my 39 last year and found it was a physical job. I took my time and it works fine.
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09-26-2011, 08:41 PM | #11 |
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Re: $250 for switching R&P in banjo rear
I did this swap in my `35 a couple of years ago and like Billy Bob I just didn't feel comfortable doing it. I have a neighbor that can do anything mechanically and has the tools to do it. After we got into it I am glad I didn't try it by myself.
I remain a Shadetree mechanic.
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09-26-2011, 10:15 PM | #12 |
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Re: $250 for switching R&P in banjo rear
I got everything ready to go and brought my friend and Flathead tranny and rearend Guru over to show me how it's done. Thats Neal Evans who used to build all of Early Ford V8s stuff before they moved south.
Anyway, it took all of 4 hours to set it up properly. I would have probobly took twice as long. I wouldn't take it to a non-flathead guy. |
09-27-2011, 07:07 AM | #13 |
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Re: $250 for switching R&P in banjo rear
While you are in there, replace the internal seals on the outer end of each housing.
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09-27-2011, 07:31 AM | #14 |
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Re: $250 for switching R&P in banjo rear
What seals? As far as I know(which is very little) about banjo's they have no outer seal on the axle. Just the hub.
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09-27-2011, 07:58 AM | #15 |
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Re: $250 for switching R&P in banjo rear
There ARE axle seals way out at the ends of the axle housings, on the inside. They're the same part as the seal up at the front of the torque tube. Install them with the lips pointed in towards the center of the car. I don't remember how I got mine out, but MAC's has a nifty little tool for putting the new ones in. It's basically a big washer welded onto a 1/2" pipe coupling. You supply a length of pipe long enough to reach way down in there.
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09-27-2011, 09:35 AM | #16 |
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Re: $250 for switching R&P in banjo rear
Don't know if I'm reading your post wrong but you cannot put an open drive pinion in a closed drive axle. The open drive pinion is threaded to accept the U joint and the closed drive pinion is splined to accept the driveline. I made my own seal installer for the axle housing using a 3/4" water pipe, and spot welding SAE 3/4 flat washer 1 " in from the end. The lip seals point towards the hub. I put 1936 3:54's in my '39 using a spline adapter to join the two different types. Not a difficult job but as everyone notes, it is time consuming. I probably had 8 hours total time in the job.
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09-27-2011, 09:55 AM | #17 |
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Re: $250 for switching R&P in banjo rear
"Install them with the lips pointed in towards the center of the car."
"The lip seals point towards the hub." ( ... I'm getting light-headed.)
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09-27-2011, 12:45 PM | #18 |
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Re: $250 for switching R&P in banjo rear
I have a whole center section out of an open drive truck that had 3.54 R&P in it and swaping the center out of my 39 rearend, and putting 40 brake drums on the rear also. I have everything for the rebuild when it comes to open drive.
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09-27-2011, 03:08 PM | #19 |
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Re: $250 for switching R&P in banjo rear
If you have the center section with the pinion in it, then you are home free!! Just swap center for center and assemble. Put some heavy grease on the ring gear and turn the pinion after assembly, then remove the bell and check the pattern and if good put every thing back together.
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09-27-2011, 04:42 PM | #20 | |
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Re: $250 for switching R&P in banjo rear
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I agree. That is the ticket for the backyard mechanic for sure. |
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