Isuzu Transmission MUA 5 Overview

MUA 5 speed overview. New flywheel, clutch kit, bearings, and seals. Description of correct seal numbers and parts. Parts will be installed at a later date with videos included.
THEY USE THE M75 DESIGINATION UP UNTILL 10-89 ON EVEN THE MUAS IN MOST OF THE VEHICLES, WHEN THEY CHANGED IT OVER TO RMN FOR THE MUAS STARTING IN 10-89, THE EASIEST WAY TO TELL FOR SURE IS TOO LOOK AT THE TRANSFER CASE , IF IT IS AN MSG IT WILL HAVE A CAST IRON TRANSFER CASE AND THE FRT DRIVE ASSY IS BOLTED ON MUCH LIKE A PWR TAKEOFF SETUP,ALL MUAS ARE ALL ALUMINUM, MAIN CASE AND TRANSFER, ALL MSGS THAT CAME TO THIS COUNTRY HAD CABLE OPERATED CLUTCHS EXCEPT THE EARLY IMPULSE AND IT WAS AN MSG WITH HYDRAULIC SETUP, AND ALL MUAS HAD A HYRDAULIC CLUTCH, IT GETS SORTA OF CONFUSING TRYING TO DECIPHER THE PARTS BOOKS SOMETIME IF YOU ARE NOT AWARE OF THE CHANGE IN THE DESIGNATION BETWEEN THE TWO,A BIT OF HISTORY ON THE MSG IT SIMPLY STOOD FOR MANUAL SHIFTED GEAR AND WAS MADE IN A 3 SPD VERSION, NEVER IN THE U.S. MSG4 MSG4T MSG5 MSG5T THE T STANDING FOR TRANSFER CASE, NEVER DID FIND OPUT EXACTLY WHAT THE MUA STOOD FOR, BASICALLY WHAT THEY DID WAS TO USE THE MSG TRANS ON ALL ENG UP THRU THE 2.3 SIZE ENG, AND THE MUAS FROM THE 2.6 AND UP ENG SIZE, THE LATER SIZE MSGS WERE ALLMOST AS STRONG AS THE MUAS, AND A GOOD BIT LIGHTER

[@macmaniacal]

I just pulled one of these and all the items required from Pnp in hopes to remove the failed auto that's in it now. Thankyou for the info!

[@AE-lk3uc]

The msg5 was used all the way thru 1995 but only on engines smaller than the 2.6 and commonly found behind the 2.3 . It was upgraded in 1988 with a larger input shaft and bearing a but was used thru 1995.

[@shadetreeautomotiveenthusi1284]

Yes, I've gotten them mixed up before. I've got the 2.6l, and the MUA5. Transmission is still holding up.

[@stevemortillaro7201]

Rule of thumb: if it has clutch hydraulics it’s mua5 if it has a clutch cable it’s msg

[@kyangpalabrica8349]

I just wanna ask if where's the drain plug and oil filler of the transmission and the transfer case?

[@shadetreeautomotiveenthusi1284]

No filter, this is a manual or "Standard" Transmission. The drain plug is at the bottom center of the transmission, the transfer case's is at the back. All drain plugs are big headed bolts, bigger than every other bolt, and low to the very bottom of the transmission and transfer case. Both have 2 separate drains and 2 separate fill plugs. The fill plugs are at the halfway mark of the transmission and transfer case. All 4 bolts are the same size. Somewhere around 1 inch in size, give or take. You fill up the transmission until some fluid starts leaking out. Use 10w-30 motor oil for 100,000 miles or less. 10w-40 or 10w-50 for higher mile transmission over 100,000. This is only for Isuzu Transmissions. Borg Warner uses ATF in a manual transmission.

[@calibowhunt]

Do you happen to remember the part number for the front seal

[@shadetreeautomotiveenthusi1284]

Cross this part. It fits the 2 and 4 wheel drive manuals. The MUA line, NOT the Borg-Warner trans. Start with this part number, then cross-reference other brands from there. This is the right seal, it's just the cheap brand. www.autozone.com/drivetrain/transmission-seal/p/duralast-transmission-seal-710511/629985_0_0

[@mohammadkhayum2679]

I want to now in witch model Isuzu 4wd 4+1 gearbox came I want manual book

[@Eric-yi4mz]

Where did you get that transmission. Is it a junk yard or reman thanks Eric

[@shadetreeautomotiveenthusi1284]

Pulled from someone on ebay

[@Ro0y4L]

I have a problem with my transmission getting hot,do you know any reasons as to which is that? 4ja1 engine

[@shadetreeautomotiveenthusi1284]

Standard or Auto? If it's a standard, check the oil level and type. If it's an auto, check the trans cooler built into the radiator. If not, add an external cooler, as I always do on autos.

[@Ro0y4L]

@@shadetreeautomotiveenthusi1284 standard, manual

[@shadetreeautomotiveenthusi1284]

@@Ro0y4L Check what type of oil your transmission requires e.g: engine oil, or something else, and if you have enough in it.

[@Ro0y4L]

@@shadetreeautomotiveenthusi1284 last mechanic said I put 75w90, do you think I could change it to 5w30, would the oil seals leak now because of the less dense oil, don't want to soak the clutch

[@shadetreeautomotiveenthusi1284]

@@Ro0y4L It depends on what it calls for from the factory. Do you know what Transmission it is? Model number?

[@caremalewis7767]

How long is the clutch Carla in cm

[@juanjimenez265]

that transmission is a ISUZU MSG , because MUA5 it have removable bellhousing

[@shadetreeautomotiveenthusi1284]

The MSG is weaker than the MUA, as far as I've seen internally, it's an MUA

[@juanjimenez265]

@@shadetreeautomotiveenthusi1284 i said msg-5f not msg . the msg-5f is the same mua5 but it come with long shift rpm . the msg that you know , is it a little one , with integral housing . msg 5f it come with removable bell housing

[@shadetreeautomotiveenthusi1284]

This is for the USA... THEY USE THE M75 DESIGINATION UP UNTILL 10-89 ON EVEN THE MUAS IN MOST OF THE VEHICLES, WHEN THEY CHANGED IT OVER TO RMN FOR THE MUAS STARTING IN 10-89, THE EASIEST WAY TO TELL FOR SURE IS TOO LOOK AT THE TRANSFER CASE , IF IT IS AN MSG IT WILL HAVE A CAST IRON TRANSFER CASE AND THE FRT DRIVE ASSY IS BOLTED ON MUCH LIKE A PWR TAKEOFF SETUP,ALL MUAS ARE ALL ALUMINUM, MAIN CASE AND TRANSFER, ALL MSGS THAT CAME TO THIS COUNTRY HAD CABLE OPERATED CLUTCHS EXCEPT THE EARLY IMPULSE AND IT WAS AN MSG WITH HYDRAULIC SETUP, AND ALL MUAS HAD A HYRDAULIC CLUTCH, IT GETS SORTA OF CONFUSING TRYING TO DECIPHER THE PARTS BOOKS SOMETIME IF YOU ARE NOT AWARE OF THE CHANGE IN THE DESIGNATION BETWEEN THE TWO,A BIT OF HISTORY ON THE MSG IT SIMPLY STOOD FOR MANUAL SHIFTED GEAR AND WAS MADE IN A 3 SPD VERSION, NEVER IN THE U.S. MSG4 MSG4T MSG5 MSG5T THE T STANDING FOR TRANSFER CASE, NEVER DID FIND OPUT EXACTLY WHAT THE MUA STOOD FOR, BASICALLY WHAT THEY DID WAS TO USE THE MSG TRANS ON ALL ENG UP THRU THE 2.3 SIZE ENG, AND THE MUAS FROM THE 2.6 AND UP ENG SIZE, THE LATER SIZE MSGS WERE ALLMOST AS STRONG AS THE MUAS, AND A GOOD BIT LIGHTER

[@juanjimenez265]

@@shadetreeautomotiveenthusi1284 MSG 5f is the MUA all the other MSG 5T ECT ones are real MSGs for the early years.

[@garryaragon2233]

Sir.is that fit also in 4ja1 engine.if not what transmission with transfer case fit in it.

[@shadetreeautomotiveenthusi1284]

The diesels usually use a different trans. They typically use the MSG transmission.

[@garryaragon2233]

@@shadetreeautomotiveenthusi1284 thank you so much for your reply sir .more power to you.

[@jorgeverdin1300]

Is v6 or 4cil..??

[@shadetreeautomotiveenthusi1284]

2.6l 4 cylinder. 4ZE1.