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Re: 1950 4400 [Re: Dcurtis] #1310033 Wed May 08 2019 01:46 PM
Joined: Mar 2004
Posts: 3,877
M
Mike B Offline
Shop Shark
The rear spare tire bracket more than likely hung on two stud (with big wing nuts) that attached to the side of the frame rails (that's the way it is on the TF trucks).

Mike B smile

Re: 1950 4400 [Re: Dcurtis] #1310068 Wed May 08 2019 08:53 PM
Joined: Nov 2000
Posts: 1,620
F
Frank50 Offline
Shop Shark
Do take all necessary precautions while handling/cleaning animal waste/ mice pee/poop. You don't want the hantavirus.

As much as I love old Chevy trucks, frankly there's not much left to love with that one. Major mechanical parts, body panels, hired body work, hired mechanical work, all the small stuff, etc... add up over time. The best advice I ever heard as it relates to any old car/truck, collector vehicle... is buy the best example of what you want that you can afford. Dragging one home from the fencerow is kinda romantic, but usually takes too long and cost too much.

Of course I'm just some guy with a keyboard. It's your truck. Do what you want to do - but do it safely.

Re: 1950 4400 [Re: Dcurtis] #1310312 Sat May 11 2019 01:04 AM
Joined: Sep 2012
Posts: 52
D
Dcurtis Offline OP
Wrench Fetcher
What terms do you use when searching for a 235 on like a Craigslist or searchtempest or something like that. I don’t have much luck searching Craigslist. I usually use like Chevy 235 of Chevy 235 engine or something along those lines.


Dan
Re: 1950 4400 [Re: Dcurtis] #1310715 Tue May 14 2019 07:44 PM
Joined: Nov 2000
Posts: 1,620
F
Frank50 Offline
Shop Shark
What you mention has worked for me. Any combination/arrangement of Chevy 235 engine should get some hits. You may have to widen your search.

Re: 1950 4400 [Re: Dcurtis] #1310740 Tue May 14 2019 10:19 PM
Joined: May 2017
Posts: 152
S
sweepleader Offline
Shop Shark
The current owner might not know what a 235 is, that is working against you. You might try "Chevrolet 6 cylinder" with the years you are interested in. You might have to buy an entire or partial vehicle.


Mac :{)

1962 K10 short step side, much modified for rally
1969 T50 fire truck, almost nos, needs a few things
Re: 1950 4400 [Re: Dcurtis] #1311589 Thu May 23 2019 03:18 AM
Joined: May 2019
Posts: 3
B
B.Kelley Offline
New Guy
I like ecklers classic Chevy for parts and they have books as well. The shop manual and user manual are very informative and worth having. The engine size however is difficult given you're not very good on the internet, the best way is to find the serial number stamped on the block behind the distributor and look it up on the Web. I have been told that if you have the original oil pan, a 235 will have 235 stamped on the side of the oil pan. Another great place for parts is NAPA, at least my local Napa is very informative and usually has what I need in stock. Great looking truck by the way, I have 51 4400.

Re: 1950 4400 [Re: Dcurtis] #1311855 Sat May 25 2019 12:19 AM
Joined: Sep 2012
Posts: 52
D
Dcurtis Offline OP
Wrench Fetcher
New question..
it is my understanding that it is not possible to regear the stock rearend. Is that correct? So if I want to keep it a dually is there any certain axle I should be looking for that will fit the best or is it more personal preference?
I have been giving every nut and bolt I can see anywhere a blast of pb blaster every week for the last few weeks as well as dosing the cylinders with atf acetone mixture. But I really don’t hold out much hope that my 235 will ever turn again. It’s very possible that the replacement engine will have a few more cylinders than the current engine.
I’m hoping to be able to get it into my shop within the next few weeks to begin the diagnosis of what it still serviceable on my truck and begin to firm up my plans a little more


Dan
Re: 1950 4400 [Re: Dcurtis] #1311869 Sat May 25 2019 02:27 AM
Joined: May 2005
Posts: 9,116
G
Grigg Offline
.
Before answering about regearing you need to know the present ratio. But the answer, even if yes, is still not very fast.

GM used Dana 70HD and Dana 80 axles in later model P30 and similar chassis. These axles from those applications have same bolt pattern (but larger 5.25” center bore). They are also available in useful ratios as well as even faster that you could use. Down side is they only have disc brakes, which then requires swapping to front disc brakes too, so more work and expense.


1951 GMC 250 in the Project Journals
1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
1952 Chevrolet 3800 pickup
---All pictures---
"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-
Re: 1950 4400 [Re: Dcurtis] #1311889 Sat May 25 2019 08:54 AM
Joined: Sep 2012
Posts: 52
D
Dcurtis Offline OP
Wrench Fetcher
How do I identify the current gear ratio? There are no plates anywhere I guess I have to wait until I can remove the diff to see. I don’t really want to do a front axle swap too. Wow lots of things I didn’t think of !!!


Dan
Re: 1950 4400 [Re: Dcurtis] #1311899 Sat May 25 2019 01:05 PM
Joined: May 2005
Posts: 9,116
G
Grigg Offline
.
You may find some useful info in the Tech Tips section of this site, link at very top of page, or here
https://www.stovebolt.com/techtips/

One of those is about the P-30 rear axle swap.
https://www.stovebolt.com/techtips/bigbolts/p30swap/

A more approachable front brake upgrade (than in the above tech tip) can be found here, sticky thread in the Big Bolts section.
https://www.stovebolt.com/ubbthread...4-1-1-5-and-2-ton-trucks.html#Post725572

You can find the gear ratio by counting turns of the driveshaft and wheels, don't need to disassemble anything.
First assume it has a standard differential, no locking device. If that is the case (should be for your model) then leave one wheel on the ground, jack up the other and because of the differential action the wheel that turns will turn twice as fast than if both turn.
Turn the one wheel 20 times and count turns of the driveshaft. Divide the result by 10 for your gear ratio, for example 61.7 turns of driveshaft is 6.17:1 ratio. Others may advise to only turn the wheel once, or turn both wheels together once.. the method I have described is both easier and more accurate.


1951 GMC 250 in the Project Journals
1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
1952 Chevrolet 3800 pickup
---All pictures---
"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-
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