Thread: Isuzu Gearboxes

bush65,Dougal and Dranged have alot of knowledge on gearboxes!!!

i think Dougal has a isuzu box behind his 4bd1T but cannot remember if it is a MSA or MXA think its a MSA if i remember correctly bush65 has also mated one to his 4bd1T i think so give them a PM if they dont pop up on the thread

all i can say is most will say 4speed lt95 gearbox is the strongest out of the land rover boxes then probably a late model R380 then 5speed lt85 santana box then a LT77 (even though i hav found the LT77 to be a great box) as for the isuzu boxes from what i hear they are very strong but hav a cable selector i believe there is 2 threads on here one about 4bd1 gearbox combos which talks about what gearboxes people hav and what trouble they hav had and the other post is about the isuzu gearbox ratios etc etc
do not know about the new 6speed's in the puma's but i hear they are a great box (should know on monday )taking in mind all gearboxes will be destroyed if driven to hard

can only dream of having a 9speed road ranger behind a 4bd1T

Originally Posted by c.h.i.e.f

bush65,Dougal and Dranged have alot of knowledge on gearboxes!!!

i think Dougal has a isuzu box behind his 4bd1T but cannot remember if it is a MSA or MXA think its a MSA if i remember correctly bush65 has also mated one to his 4bd1T i think so give them a PM if they dont pop up on the thread

all i can say is most will say 4speed lt95 gearbox is the strongest out of the land rover boxes then probably a late model R380 then 5speed lt85 santana box then a LT77 (even though i hav found the LT77 to be a great box) as for the isuzu boxes from what i hear they are very strong but hav a cable selector i believe there is 2 threads on here one about 4bd1 gearbox combos which talks about what gearboxes people hav and what trouble they hav had and the other post is about the isuzu gearbox ratios etc etc
do not know about the new 6speed's in the puma's but i hear they are a great box (should know on monday )taking in mind all gearboxes will be destroyed if driven to hard

can only dream of having a 9speed road ranger behind a 4bd1T

Mate I run an R380, so dont ask me about Isuzu boxes. The 109 has just adapted an Isuzu box with linkages so he would be the one to ask.

Justin

auh couldnt remember if you had a isuzu box... even though it isnt a isuzu box your happy with it behind the 4bd1T arent you?

Originally Posted by c.h.i.e.f

bush65,Dougal and Dranged have alot of knowledge on gearboxes!!!

i think Dougal has a isuzu box behind his 4bd1T but cannot remember if it is a MSA or MXA think its a MSA if i remember correctly bush65 has also mated one to his 4bd1T i think so give them a PM if they dont pop up on the thread

all i can say is most will say 4speed lt95 gearbox is the strongest out of the land rover boxes then probably a late model R380 then 5speed lt85 santana box then a LT77 (even though i hav found the LT77 to be a great box) as for the isuzu boxes from what i hear they are very strong but hav a cable selector i believe there is 2 threads on here one about 4bd1 gearbox combos which talks about what gearboxes people have and what trouble they have had and the other post is about the isuzu gearbox ratios etc.
Do not know about the new 6 speed's in the puma's but i hear they are a great box (should know on monday )taking in mind all gearboxes will be destroyed if driven to hard

can only dream of having a 9speed road ranger behind a 4bd1T

Dougal has a 6 speed as does bush65 (I think??) and have looked at the ratios thread "The Grubb" as you maybe aware is making up isuzu gearbox adaptors for the LT 230. Perhaps it does not matter which box people prefer, there is some variation with with first gear ratios and 2nd to 3rd. Wondered what peoples thought where on the different boxes and if the MXA boxes woud suit The Grubbs conversion components and what box would best suit a 1.2 ratio transfer case.

Good luck on Monday just spoke to chap today with a new Puma LOVES IT,so savour the experiance.
Garry

auh ok well if they hav 6 speeds thats even better well i hav no idea about the conversion but i think bush65 had a pretty detailed section on the comparison of the boxes which i found to be very good!

thanks i cant wait until i get the puma should be a great car but i dont know how my other landys will like it lol

I currently run a 5 speed MSA (MSA-5G) from a 4BE1 powered NPR250.
AFAIK the MXA are interchangable, but expect to need a new clutch plate.

My MSA-5G has an alloy bellhousing and shifter forks, where the older MSA-5P which currently sits on a pallet in the corner had these items steel at a significant weight gain.

BTW, my MSA boxes have different input and output splines. A new clutch plate solves the input spline issue, if you're using the factory output flange then the output splines are a non-issue. I got a new adapter shaft made from this box to my LT230.

Originally Posted by Dougal

I currently run a 5 speed MSA (MSA-5G) from a 4BE1 powered NPR250.
AFAIK the MXA are interchangable, but expect to need a new clutch plate.

My MSA-5G has an alloy bellhousing and shifter forks, where the older MSA-5P which currently sits on a pallet in the corner had these items steel at a significant weight gain.

BTW, my MSA boxes have different input and output splines. A new clutch plate solves the input spline issue, if you're using the factory output flange then the output splines are a non-issue. I got a new adapter shaft made from this box to my LT230.

Dougal my intention was to buy one of Sheldon's gearbox kits, that he has now completed and should soon start making up sets. I have a truck motor no clutch, pressure plate or for that matter flywheel. I had read a thread that you had listed several flywheels that are available to suit a 4bd1. My will have a variable vane turbo attached to it it gain a bit more low down and mid range torque. You or any ones advise on tyhe best components to get in this regard would be appreciated. Not quiet sure what I will need the fly wheel espeacially not sure on, lightening the box by using a MSA-5G sounds appealing, spourcing these bits ?? sugestion welcombed
Kindest regards
Garry

Originally Posted by garryseries3

Dougal my intention was to buy one of Sheldon's gearbox kits, that he has now completed and should soon start making up sets. I have a truck motor no clutch, pressure plate or for that matter flywheel. I had read a thread that you had listed several flywheels that are available to suit a 4bd1. My will have a variable vane turbo attached to it it gain a bit more low down and mid range torque. You or any ones advise on tyhe best components to get in this regard would be appreciated. Not quiet sure what I will need the fly wheel espeacially not sure on, lightening the box by using a MSA-5G sounds appealing, spourcing these bits ?? sugestion welcombed
Kindest regards
Garry

The flywheel part numbers I posted were from an industrial 4BD1 parts manual, I only have part numbers and some drawings, no measurements unfortunately.
I run the stock truck flywheel and clutch, mine being an early 4BD1T (85/86) it has a 275mm clutch instead of the 300 found in the post 88 models. This size clutch has no problem coping with the torque I put through it.
I would like to put a heavier flywheel or even flywheel weights on mine to smooth out low rpm torque. But I haven't yet done the work necessary to find out how much space is available and what can fit. Given the rangie hasn't been out the garage in 5 months it will be a while before that happens.

My MSA 5G box with the aluminium bellhousing is from a 1992 model year truck, my original box with the steel bellhousing is from an 85/86 model year truck. It could simply be a year thing rather than model code.