LUVTruck.com

hey guys just looking to see if anyone on the forum that has converted from auto to manual can give me some info
helping someone gather parts for their build, i need to know if the drivelines are different between the auto and the 4 speed, length, yoke, spline count, anything? hoping to gather up the parts with as little running around as possible

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Luvless
1980 Mikado-Sold.

1993 Lexus SC400 my Daily
2004 Yamaha WR250F my new love in life
2016 Toyota Camry my girls ride

The driveshaft is different. You will need to add the clutch pedal, depending if its a cable or hydraulic you will need the associated parts. The flex plate will need to be replaced with a flywheel. Without a parts truck nearby I wouldn't do it. If I remember correctly the carbs are differant too.

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Certified pilots, looking down on people since 1903.

he has a parts truck but it is a 4x4 so im trying to get the needed parts that he cant pull from the 4x4 donor truck. will bring along flywheel/clutch, driveshaft and clutch cable.
trading for a new front end for my luv so trying to make sure i get him the parts he needs as well
for the carb im guessing the major difference would be some form of tv cable to control the trans that could be left out when using a 4 speed?
thank you for the info also. have been trying to figure it out for a couple days

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Luvless
1980 Mikado-Sold.

1993 Lexus SC400 my Daily
2004 Yamaha WR250F my new love in life
2016 Toyota Camry my girls ride

If you install the 4X4 trans in the 2WD truck expect a ton of issues. I wouldn't even attempt it. The auto truck will have a starter interlock so it can't start in gear, you will have to change it to a clutch switch, what are you going to do with the coasting rich electrical, you will have to modify the harness for the trans.

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Certified pilots, looking down on people since 1903.

he has a 4x4 parts truck but wants to install a 2wd manual in his 2wd auto truck
not positive how he plans to do it with the electrical will have to take a good look at it

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Luvless
1980 Mikado-Sold.

1993 Lexus SC400 my Daily
2004 Yamaha WR250F my new love in life
2016 Toyota Camry my girls ride

You will need to get the brackets for the clutch cable top and bottom, or does this trans have a hydraulic system. I might be wrong but I think most 4X4 owners pull the engine to do a clutch as you can't get a 4X trans/transfer case out the bottom. You will need to locate the place on the cab to pu nth a hole for the clutch cable/hydraulic rod. This will not be a weekend project so plan ahead.

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Certified pilots, looking down on people since 1903.

its the standard 78 luv 4 speed trans he is going to use so its a cable. the 4x4 trans isnt in the picture at all i doubt it will leave the donor truck, he is going to use the pedals, cable and brackets from the parts donor 4x4 to mate with the 2wd trans from a donor in the picknpull by my house.
im only in the picture trading the trans, driveline and the parts associated with them for some body parts from his donor truck unless he asks for help with the install.

on a side note it is dang near impossible to take the 4x4 trans out without pulling it with the engine. when i got my truck the trans/case never came out we just took out the engine and replaced it and the clutch. pretty much have to cut out the crossmember to get it out.

thinking about it, if he was to wire a switch to the automatic starter safety mechanism it would make a hell of a theft prevention tool

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Luvless
1980 Mikado-Sold.

1993 Lexus SC400 my Daily
2004 Yamaha WR250F my new love in life
2016 Toyota Camry my girls ride

For some reason I thought you were installing the 4x trans is the 2wd truck. You will need a driveshaft from the 4 speed manual truck, graphic that from the pick n pull truck. It should be easy after that. From the 4x donor truck I think the wiring harness that runs to the trans disconnects and should plug into the auto trans harness. These trucks have a issue with the pedal assembly cracking, I would grab the 4x donor trucks as a spare. Pull it as a unit so you can see how to install it in the auto, it has washers and shims and a pin. My parts book shows the same pedal assembly for the auto and manual LUV. Not sure how the shifter will fit, you may need to cut a hole for that but there will be a dimple where that will need to be done, same goes for the clutch cable.

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Certified pilots, looking down on people since 1903.

awesome dude thanks you so much for the info

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Luvless
1980 Mikado-Sold.

1993 Lexus SC400 my Daily
2004 Yamaha WR250F my new love in life
2016 Toyota Camry my girls ride

here is whats going on, i'm picking up a 79 4x4 as a parts truck here soon, and love4theluv needs some parts so we are gonna trade. just trying too figure out what all i need too swap it from auto too manual. so far ive got the driveshaft, clutch assembly and the wiring. is that it?would i need too change the crossmember at all?

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I'm workin' on it
78 chassis with 75 cab
SBC

The cross member MIGHT be ok, the trans mount will need replaced.

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Certified pilots, looking down on people since 1903.

A 4wd driveshaft will be too short to use with a 2wd manual tranny because of the added transfer case lenght. A 2wd 4sp & 5sp MSG tranny are both exactly the same length but some later 5sp have a different tailshaft spline count & diameter, so make sure the driveshaft front splines match the tranny you are using. A driveline shop can adjust the length or swap the splined yokes as needed.
BTW you're supposed to take off the removeable portion of the t-case when removing the 4wd MSG tranny. This allows the tranny to pull back a bit, then rotate 90 degrees so that the starter bulge will clear the tunnel, then the tranny will pull farther back above the crossmember enough to allow the front to drop down & under the engine as you slide the tranny forwards off the crossmember. The outer half of the t-case no longer hits the crossmember- or requires you to try to lift it above the crossmember & jam it into the tiny space above. It also removes a bit of weight, which helps most when trying to mate the tranny back to the engine.

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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.

will i need the radiator from the manual truck also?

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I'm workin' on it
78 chassis with 75 cab
SBC

No, you won't need it.

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Certified pilots, looking down on people since 1903.

ok thanks for the info!!

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I'm workin' on it
78 chassis with 75 cab
SBC

I did this in a 77 without too much trouble. Should be easier with the cable clutch instead of getting the hydro clutch parts all put in. Just be careful about mixing and matching anything 77 and older with 78 and newer. The pedal bracket, firewall, and transmission changed between those years. (Clutch fork is on the driver side 78+ and passenger side 77 and older)

I believe that the rear differential ratio is supposed to be slightly different for the Auto trans, but it was definitely not noticeable on mine. I checked mileage several times and it clocked just about the same as the the 76 factory manual trans LUV I had. I ultimately swapped the axle from another 2WD factory manual LUV when the pinion seal blew and couldn't see any change then either. If anything though you get a better highway gearing (lower RPM for same road speed) but it would be very little *diff*erence.

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95 Isuzu Trooper Daily Driver
86 Isuzu Trooper reliable backup
77 LUV 2wd stock beltway blaster (resting)
79 4x4 LUV project: 2.6L, 5spd, 31s (eventually)

MEPR: Man, my 4x4 makes all other LUVs look good