LUVTruck.com

Does anyone know the stock driveline front slip yoke count? And is it fine or coarse? And it's a 78' as I need to find a yoke for my trans so I can swap them if not soon I will just go to Drivelines Nw and ask them to check all my hardware

Pretty sure a '78 4sp is a 17 spline. If you're swapping in a 5sp they will be 26(?) spline & a larger overall diameter, the 4 & 5sp use different tailshaft seals.

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'78 Chevy LUV,1.9,4sp,headers,31's,SAS Dana 30,Dana 20,SOA rear w/Aussie Locker, rough body, bought new 12/4/78.
'87 Trooper,2.3,5sp,headers,31's,ball joint flip & spacer,Aussie Locker rear,Superwinch hubs,brush guard w/5.5K winch,more to come.

Oh, I assumed he meant the front yoke for a 4wd, if there is such a thing (that shows my 4wd ignorance). Saying "front" when there's only one is confusing. But if it's indeed the slip yoke for a 2wd, the spline count of a 5-speed will depend on what year it comes from. The 26 (27) is for '86-'95 transmissions. The '81-'85 transmissions had a 17-tooth shaft, if I recall correctly.

Jack

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'83 Isuzu P'up Diesel LS - Original Owner
JoeIsuzu@IsuzuPup.com
IsuzuPup.com

The front slip yoke spline count that fits onto the trans tailshaft itself the spline count from the back part of the trans as I have a 5-spd that has a front shaft that fits into a stock 24 spline luv clutch kit and I'm wondering this tailshaft will have the luv stock slip yoke slide onto the 5-spd, not trying to offend anyone or insult but just trying to break it down a bit better as I apologize for my crappy explanations

Here's a shot of the old-style yoke, looking down into it. I'll let you count splines. It's from
viewtopic.php?f=8&t=22109&p=161754#p161754

Now, here's a shot from the same angle, of a yoke from later-model Isuzu 5-speed--specifically, from an '86 2.3L 5-speed 2wd. Again, you can count the splines.


Jack

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'83 Isuzu P'up Diesel LS - Original Owner
JoeIsuzu@IsuzuPup.com
IsuzuPup.com

See if this answers what I think you are asking: your stock Luv tailshaft slip yoke will only fit an early diesel 5sp, not an '86 or later gas 5sp. They not only have a different spline count they are a different diameter. When you swap a gas 5sp into a LUV you must have the 5sp slip yoke mated to the LUV driveshaft, if the front u-joints are the same size mate them there & go, a gas 4sp & five sp are the same length, so the drivshaft length doesn't change.

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'78 Chevy LUV,1.9,4sp,headers,31's,SAS Dana 30,Dana 20,SOA rear w/Aussie Locker, rough body, bought new 12/4/78.
'87 Trooper,2.3,5sp,headers,31's,ball joint flip & spacer,Aussie Locker rear,Superwinch hubs,brush guard w/5.5K winch,more to come.

So to get a matching one could you possibly give me a measurement to the stock slip yoke as I need to measure the seal on my trans and then either go to drivelines Nw or just pay for one from one of the luvtruck members then I take it but how much for one from you if it's the right one?

I still don't understand your questions. I don't understand what you need to measure, or why. We can tell you what vehicles have the slip yoke you need, if you know what transmission you're using.

How much for one from whom? I haven't seen one for sale, lately.

Jack

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'83 Isuzu P'up Diesel LS - Original Owner
JoeIsuzu@IsuzuPup.com
IsuzuPup.com

Well i don't know what trans I have, but Drivelines Nw told me I could measure the trans rear seal and the tails shaft diameter and they could get one or make one for me as long as I knew those measurements and the length from ujoint to front of the slip yoke. that's the measurement I was asking about from the stock driveshaft you have if possible so I don't have to pull my daily driver apart until I have all the parts. But I was asking if you had a slip yoke that would fit my trans or someone on here close and how much you would want for it??

You don't know what trans you have...but you want to know if someone else has a slip yoke that will fit it. I'm thinking that little piece of info (what trans you have) is going to be vital in order to know what will fit it.

I'm out, somebody take my place here.

Jack

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'83 Isuzu P'up Diesel LS - Original Owner
JoeIsuzu@IsuzuPup.com
IsuzuPup.com

Come on Jack! Stick with it, you can do it! At least you can correct what I try.
Let's see if we can determine what tranny you have, but you are going to have to physically look at the tranny.
You said it's a 5speed & a LUV clutch fits the input shaft, so it's either gas (starter mounts on the passenger side) or diesel (starter mounts on the driver side). If it's diesel sell it & get the right tranny. If it's gas then it's either an Isuzu or a Borg-Warner, it should say somewhere on the case or at least have an emblem. If it's a B-W sell it & get the right tranny. Let's assume it's an Isuzu and for a 4cylinder engine (6cylinder tranny won't fit your engine ever- sell it & get the right tranny). 4cylinder Isuzu is either an MUA (hydraulic clutch with the clutch arm passenger side) or MSG (cable clutch with the clutch arm drivers side). MUA- sell it & get the right tranny. The MSG is the one you want. They were most common in 2wd pickups '86-'95 with the 2.3L engine. If all this points to you having this type tranny go to a salvage yard & get a slip yoke (or better yet the whole drive shaft) for an '86-'95 2wd Isuzu pickup with the 2.3L engine (NOT the 2.6L engine) and you don't need to measure anything- the slip yoke for those years of that truck with that engine will fit. The reason for getting the whole drivshaft is that the slip yoke may not have a u-joint that will fit the rest of the LUV driveshaft- you may have to take pieces from both to make one.

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'78 Chevy LUV,1.9,4sp,headers,31's,SAS Dana 30,Dana 20,SOA rear w/Aussie Locker, rough body, bought new 12/4/78.
'87 Trooper,2.3,5sp,headers,31's,ball joint flip & spacer,Aussie Locker rear,Superwinch hubs,brush guard w/5.5K winch,more to come.

Yes it fits the luv clutch set, starter mounts on passenger and exact bolt pattern as I bolted it to the extra motor I have, and a clutch arm on drivers side and cable clutch. And it has an isuzu emblem on the side of it

I said I was done, but we're almost there. You apparently have an MSG-5 transmission, which is the RIGHT one. But we don't know if it's the early model, or the later model.

So, one more question. And if you can't answer this one, you might as well give up. Because nobody can help you unless you tell us this: How many splines are on the output shaft of this 5-speed transmission?

Jack

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'83 Isuzu P'up Diesel LS - Original Owner
JoeIsuzu@IsuzuPup.com
IsuzuPup.com

OK Jack now I may be confused.
I thought all MSG 5sp prior to '86 were diesel, all gas MSG 5sp '86 & later came from 2.3L vehicles and as a matter of course had the bigger out put shaft. Was there a gas MSG 5sp with the small shaft?

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'78 Chevy LUV,1.9,4sp,headers,31's,SAS Dana 30,Dana 20,SOA rear w/Aussie Locker, rough body, bought new 12/4/78.
'87 Trooper,2.3,5sp,headers,31's,ball joint flip & spacer,Aussie Locker rear,Superwinch hubs,brush guard w/5.5K winch,more to come.

Yes, but it's even more complicated. In 2wd, 5-speed, the larger output shaft didn't come along until '86. But I'm told the earlier 4wd always the larger output shaft (even though it was 4-speed). I can't personally verify that. Also, I've been told the automatics used the same yoke, but that may have been just 2.3 automatics. I'm pretty certain the diesel automatic I picked apart did not have the large shaft.

Jack

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'83 Isuzu P'up Diesel LS - Original Owner
JoeIsuzu@IsuzuPup.com
IsuzuPup.com

OK, then what I told the OP was MOL correct, if he has a 2wd gas 5sp (which from his description he does) it automatically will have the bigger tailshaft & slip yoke, he must get a slip yoke that will fit the 5sp, the smaller stock LUV tailshaft won't fit the 5sp.

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'78 Chevy LUV,1.9,4sp,headers,31's,SAS Dana 30,Dana 20,SOA rear w/Aussie Locker, rough body, bought new 12/4/78.
'87 Trooper,2.3,5sp,headers,31's,ball joint flip & spacer,Aussie Locker rear,Superwinch hubs,brush guard w/5.5K winch,more to come.

No, and sorry if I've made this more confusing than it is. It depends on the year that the 5-speed trans was from. If '81-'85, it has the smaller tailshaft, and depending on the spline count of the LUV, it might fit (I'm not familiar with the 1st-gen specs). If '86-'95, the larger one is needed.

Jack

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'83 Isuzu P'up Diesel LS - Original Owner
JoeIsuzu@IsuzuPup.com
IsuzuPup.com

a 78 2wd (((with the original trans))) would be the original 10 spline wouldn't it?

theres 26 its a given if its 4wd its 26 spline "no matter the year model",
17 spline was in the 81/85 2wd years
and the ol 10 spline? in the 70s 2wds? is that right? or is it 12 spline

ive found 76 and 77 years with the ultra coarse 10 spline 4sp in u-pull yards, so i know there out there. just dont know the last year was it 77, 78, 79 or 80?


as far as the front drive line there is no spline, it has bolt up flanges on each end. no matter what type of the 3 MSG 4wd tranys it has.
but since 78 is NOT A 4WD YEAR id say i can narrow it down by saying you have a 2wd LUV

you stated its cable clutch so that eliminates the early trans that's HYD clutch.

that leaves the super early MSG 4sp with 10 spline, or its been retro fitted to a 17 or 26 spline 2wd MSG thats cable clutch.

other than the spline count, frunt bearing retaner 4 or 6 bolt on 4speeds only 6 bolt on 5speeds.
or how many bolts hold the shiftier in its spot, (under the little rubber boot at the base of the shifter)
2 for an early, 3 for a later model, granted some later model 4speeds still have the 2 bolt on the shifter.

even with them side by side out of the auto.
its next to impossible to tell them apart, cuse the housing case is near identical for all of them.

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86trooperT/D 2.2
84 L\B 4x4Diesel LS 2.2
84 S\B 4X4 gas rust bucket 1.9
86 L\B 4X4 gas 5 speed 2.3
the twins, 81 pup and 81 LUV both are diesel 2.2



The Energizer Bunny is trying to keep up, and is starting to gasp for air!!

See if my logic here is correct:
There were no gas 5sp until they were mated to the 2.3 in '86, correct? All 5sp prior to '86 were diesel, correct? Since we have determined OP has a gas 5sp it must be '86 or later and hence must have the larger slip yoke, correct?

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'78 Chevy LUV,1.9,4sp,headers,31's,SAS Dana 30,Dana 20,SOA rear w/Aussie Locker, rough body, bought new 12/4/78.
'87 Trooper,2.3,5sp,headers,31's,ball joint flip & spacer,Aussie Locker rear,Superwinch hubs,brush guard w/5.5K winch,more to come.

We're repeating. If that's correct, I'm wrong. When I bought my new diesel P'up in 1983, I'm almost 100% sure the dealer brochure listed a gas 5-speed as one of the options.

Jack

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'83 Isuzu P'up Diesel LS - Original Owner
JoeIsuzu@IsuzuPup.com
IsuzuPup.com