roadrunner
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 posted on 28/1/10 at 08:29 PM |
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DIFF PROBLEMS
I have just bolted a newer diff into my Indy and tried to put the half shafts in, only to find that they do not fit.
I had a seven inch diff with push in shafts, i have bought a seven inch diff with push in shafts, but it seems where the shafts slide into the diff
the recess in the diff seems shallower.
Why is this, and can i swap the old ones over or would this cause me other problems.
Thanks in advance .
Brad.
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RichardK
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| posted on 28/1/10 at 08:32 PM |
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Not sure what you mean mate.... Do you mean the shafts don't seem to push in fully? Isn't there a ring on the drive shaft toothed area
that just requires a shove?
Cheeerss
Rich
Gallery updated 11/01/2011
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roadrunner
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| posted on 28/1/10 at 08:39 PM |
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Where hole actually starts in the diff cast, there is a toothed cast ring that fits in first with a torx screw and keep holding it in place. Its the
recess on that that's not deep enough.
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jacko
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| posted on 28/1/10 at 08:58 PM |
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That part you are on about is for ajusting the diff play not to hold the drive shafts in
if i remember right the shafts just push in
Brad can you take some photos of it
Graham
[Edited on 28/1/10 by jacko]
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RichardK
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| posted on 28/1/10 at 09:06 PM |
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MMMmm, thats what I thought, must be something weird going on, did you buy the new dif and shaft together? I didn't even take off or even
loosen that toothed type ring with the torx head screw in. Just gave my half shafts a good shove to get them in over the little spring clip
that's on the shaft.
Maybe go back to the seller of the dif and shafts to ask if they came off the same vehicle?
Cheers
Rich
Gallery updated 11/01/2011
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roadrunner
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| posted on 28/1/10 at 09:09 PM |
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quote:
Originally posted by RichardK
MMMmm, thats what I thought, must be something weird going on, did you buy the new dif and shaft together? I didn't even take off or even
loosen that toothed type ring with the torx head screw in. Just gave my half shafts a good shove to get them in over the little spring clip
that's on the shaft.
Maybe go back to the seller of the dif and shafts to ask if they came off the same vehicle?
Cheers
Rich
Its just a replacement diff, so the shafts i already had.
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Big_Al
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| posted on 28/1/10 at 09:10 PM |
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I changed my diff last year and went to push the drive shafts in to find they did not fit. There are two different sized push in shafts on the
7" diffs.
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roadrunner
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| posted on 28/1/10 at 09:13 PM |
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You can see where i put the screw driver the recess i am talking about. This is the old one with a deeper recess.
 
diff
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jacko
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| posted on 28/1/10 at 09:24 PM |
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Is that your old diff ? if so can you take photo of new diff
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RichardK
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| posted on 28/1/10 at 09:34 PM |
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Arr, got confused thought you bought them together, the chances are you have a mis match and need the other type of drive shafts, I must admit I
thought there was only one type of push in shafts but I've heard this discussed before so maybe its true, wonder if the internals can be swapped
from the new dif into the casing of the old diff??
Cheers
Rich
My advice, sell that dif and buy another now knowing the type you need.
[Edited on 28/1/10 by RichardK]
Gallery updated 11/01/2011
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ashg
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| posted on 28/1/10 at 09:36 PM |
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i discovered this also when replacing the oil seals on my diff.
have you got the shafts that match the new diff?
if no then you may be able to chop and change bits over between the diffs to get your shafts to fit. doubt it will be fun though
Anything With Tits or Wheels Will cost you MONEY!!
Haynes Roadster (Finished)
Exocet (Finished & Sold)
New Project (Started)
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austin man
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| posted on 28/1/10 at 09:39 PM |
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there are 2 different diameter shafts one of the shafts is also longer, your not fitting the longest one to the wrong side are you ???
Life is like a bowl of fruit, funny how all the weird looking ones are left alone
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roadrunner
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| posted on 28/1/10 at 09:50 PM |
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quote:
Originally posted by austin man
there are 2 different diameter shafts one of the shafts is also longer, your not fitting the longest one to the wrong side are you ???
No, because i have lost my key for the locking nuts, and they have proved a right b#####d to come out, so i left them and just removed the hole
upright and wishbones to pull the shafts out.
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Chippy
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| posted on 28/1/10 at 11:17 PM |
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Sounds to me as though you have two different diff's, the one shown is a seven inch diff. If the old one you had fitted had the rebate, (shown
by your screwdriver), deeper then it's almost certainly a six and a half inch diff, which has the same outside size as the seven inch one, but
the back lash adjusters have a deeper rebate. Don't ask how I know, wasted a perfectly servicable seven inch one and got a crap six and a half
one in exchange. HTH Ray
To make a car go faster, just add lightness. Colin Chapman - OR - fit a bigger engine. Chippy
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mcerd1
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| posted on 29/1/10 at 08:19 AM |
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as above there are two different sizes for the push-in shafts with slightly different diffs to match
(it would be obvious if you had both sets of driveshafts)
but both types are still 7" diffs - the 6.5" is the front diff on a 4x4 sierra/cossie and its a totaly different animal
-
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Andy B
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| posted on 29/1/10 at 10:42 AM |
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Is it possible the new diff is an LSD unit and the old one was not as to my knowledge the pushfit shafts are longer on the splined end than the ones
for lobro bolt on- only a thought
Andy
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roadrunner
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| posted on 29/1/10 at 08:04 PM |
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It looks like the replacement diff was a LSD but it has been taken out.
So i am now after some half shafts to fit, or can the back lash thingy be swapped over.
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Chippy
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| posted on 29/1/10 at 08:19 PM |
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mcerd1
quote:
but both types are still 7" diffs - the 6.5" is the front diff on a 4x4 sierra/cossie and its a totaly different animal
This is not a correct statement, the original Sierra's had 6.5" diffs, although the case was the same size as the 7" diff. I think
you will find, if you bother to search, a complete list of the diffs fitted in the Sierra and on that you will see that the 6.5" one is quite
clearly stated. HTH Ray
Edit to add list
3,14 CW47-Pin15
3,38 CW44-Pin13
3,62 CW47-Pin13
3,92 CW51-Pin13
3,77 CW49-Pin13 6.5 inch diff
[Edited on 29-1-10 by Chippy]
[Edited on 29-1-10 by Chippy]
To make a car go faster, just add lightness. Colin Chapman - OR - fit a bigger engine. Chippy
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roadrunner
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| posted on 29/1/10 at 09:15 PM |
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Is there a way of finding this out, will it it be stamped on the back of the diff.
Brad.
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Chippy
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| posted on 30/1/10 at 12:42 AM |
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Yes there is, if you remove the back plate on the diff the crown wheel is always marked with the ratio, but, if your diff is a 6.5" one, ( and I
am sure from your description, that it is), it's going to be well old, and it may not be possable to read the markings, but you would be able to
measure the crown wheel diameter. The real clue though is that your bearing carriers have a deaper dish than the 7" one has. There really is
only one option open to you, and that is to get the drive shafts for the 7" diff if the person you purchased it from still has them, or try a
"Wanted" on this site. HTH Ray
Edit to add, if the plate is still on the back of the diff, and you can read it this may help.
Ford axle codes
A=3.36 B=3.77 D=3.92 F=3.842 J=4.056 K=3.31 M=3.14 N=4.29 P=3.58 J=3.62 V=3.33 Z=3.59 2=4.27 3=3.62 4=3.82 5=3.26 6=3.12 8=3.56
[Edited on 30-1-10 by Chippy]
To make a car go faster, just add lightness. Colin Chapman - OR - fit a bigger engine. Chippy
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roadrunner
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| posted on 30/1/10 at 09:38 PM |
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Sorry Chippy, the code on my old diff says D 3.62. So im guessing its a 7" and not a 6.5".
Thanks anyway
Brad.
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