Crawl gear fr my 5spd Bj42!

[crushers]

i am only posting up what i know...

the book says 2.3 for the 70 series autos vs the 1.9 for the manual tranny...

 

[Tapage]

I'm not sure about 2.48:1 low gearset in 70 auto trannys .. ( coz we not seen 'em here ) but 100% positive in 60 and 62 with auto trannys .. ( at least here )

Edit: Note: in this trail of the Cruiser knowledge learn that Toyota made much diferent configuration depending on the Country of target Region ..

 

[Hulsty]

Does anyone have any further info on what transmissions came with the 2.488 low range gearset? I'm starting the hunt now, from what I can find only 90+ A440F boxes had the 2.488 low range.

Apart from whats written above I cannot find aynwhere what ratios were in 1990 and earlier landcruiser auto transmissions.

 

[Tapage]

Does anyone have any further info on what transmissions came with the 2.488 low range gearset? I'm starting the hunt now, from what I can find only 90+ A440F boxes had the 2.488 low range.

Apart from whats written above I cannot find aynwhere what ratios were in 1990 and earlier landcruiser auto transmissions.

As far as I know .. all A440 ( thought from 87 or 88 ) came with 2.48:1 low range .. as same as H150 and H151 but those share other t-case family .. HFXX t-cases

 

[Ducks]

If someone does want a toybox post to this thread in the 40s section -

https://forum.ih8mud.com/40-55-series-tech/275479-who-wants-toybox.html

or this thread in the 60s section -

https://forum.ih8mud.com/60-series-wagons/275469-who-wants-toybox.html

 

[Hulsty]

Does anyone have any further info on what transmissions came with the 2.488 low range gearset? I'm starting the hunt now, from what I can find only 90+ A440F boxes had the 2.488 low range.

Apart from whats written above I cannot find aynwhere what ratios were in 1990 and earlier landcruiser auto transmissions.

I've found a 88 A440F transer from a 60 series 12HT, which is even harder to find ratio data on! Might have to strip it down and count the gear teeth to compare to my H55F transfer

 

[cruiser_guy]

Wayne or other's out there, do you know if the FJ62 has the same transfer gear ratios as the HJ60 auto and are they interchangeable?

 

[crushers]

not sure, my findings ( a LONG time ago) showed they came only behind the HJ60...
and i am not sure where i read it.

all i know is if you install the t/case gears from a HJ60 your crawl improves noticiably...

 

[Hulsty]

Well I checked out my spare gearbox and transfer, from a FJ60, 2F 4.11 diffs november 83 build, and it has a 1.9 ratio low range. Next up I will check the one in my car then the 12HT A440 transmission i've been offered.

 

[Hulsty]

Checked the 88 model A440 from a 12HT and it has 2.2956 low range gearing. Need to see if I can find a newer model gearbox, 1990+ to check more ratios

 

[Hulsty]

Check my 85 model FJ73 with 4.11's and H55F, came with 1.9 ratio low range.

I'm going to try and put the 2.29 low range into my car with a fully manual 4x4 selector without the vac shift. The 2.29 low range gives me more reduction than if I fit 4.88 ratio diff centres.

 

[crushers]

the only thing that dictates what can be swapped is the idlershaft thickness...
the nice thing about the 2.29 (or the 2./48) is on the highway everything stays the same, once you go LOW then a whole new world opens up.

 

[Hulsty]

the 88 model would have the 38mm idler, my car and my spare box being 85 and earlier would be the 34mm idler shaft. Does this change anything on the gearbox? I was going to swap on the whole transfer case, remove the vac components and fit the manual operation body for 4x4 engadgement

 

[crushers]

the vac shifer has a different moulding than the manual so it won't be a direct bolt up. some mods will be required to change from vacuum to manual.
the case will bolt to the tranny with no issues.

 

[ozwallaby]

the BJ42 5 spd comes with the 1.9 low
the BJ42 4 spd comes with the 2.3 low
the HJ60 auto comes with the 2.48 low

4.9 (H55F 1st) X 1.9 (low range) X 4.11 (diff gear) = 38.26 crawl BJ42 5 spd NA spec
4.3 (H42 1st) X 2.3 (low range) X 4.11 (diff gear) = 40.64 crawl BJ42 4 spd NA spec
4.9 (H42 1st) X 2.3 (low range gears from '4spd' t/case) X 4.11 diff gear) = 46.31 NA spec
4.9 (H55F 1st) X 1.9 (low range) X 4.88 (diff gear) = 45.43 crawl (for comparision)
4.9 (H55F 1st) X 1.9 (low range) X 5.29 (diff gear) = 49.24 crawl (for comparision)
4.9 (H55F 1st) X 2.48 (low range) X 4.11 (diff gear) = 49.94 crawl

the advantage of the low t/case gear is your day to day driveablity stays the same, fuel milage does not change but when you go into low range your crawl has been increased by 30%...quite adaquate for most wheeling.
i was incorrect in my earlier post, the t/case swap is equivilant to changing the diff gears to 5.29...sorry

i also added another of my favorite swaps for the earlier 83-85 5 spd t/case, the gears from a 81-82 4 spd t/case will slip right in giving you a healthy 46/1 crawl. a 13% crawl increase...doesn't sound like much but you can feel the increase in torque off road.

Crushers, shouldn't the 4spd low range line read 4.9 (H55F 1st) at the start or am I mistaken?

 

[crushers]

corrected: (thanks)

4.9 (H55F 1st) X 1.9 (low range) X 4.11 (diff gear) = 38.26 crawl BJ42 5 spd NA spec
4.3 (H42 1st) X 2.3 (low range) X 4.11 (diff gear) = 40.64 crawl BJ42 4 spd NA spec
4.9 (H55F 1st) X 2.3 (low range gears from '4spd' t/case) X 4.11 diff gear) = 46.31 NA spec
4.9 (H55F 1st) X 1.9 (low range) X 4.88 (diff gear) = 45.43 crawl (for comparision)
4.9 (H55F 1st) X 1.9 (low range) X 5.29 (diff gear) = 49.24 crawl (for comparision)
4.9 (H55F 1st) X 2.48 (low range) X 4.11 (diff gear) = 49.94 crawl

 

[Hendrik]

All good info. Thanks v much.