H55f/H151 shifter locations with 1HDT in 70 series

Joined
Jul 14, 2009
Messages
62
Location
Edmonton
 
 
Hello,

I am looking at a new FJ75 project that I would swap a 1HDT into (the vehicle has a good H55f in it behind the 3F.) I have been reading about the challenges with attaching the 1HDT to the H55f so I was looking at using an H151 but what I have not been able to find is the relative dimensions of the H151 vs the H55 as far as shifter locations etc. Having gone through relocating the shifter in my 3B/H55F swap in the BJ40 I would rather not go there again, does the fit H151 well or are there significant mods to do?

Thanks,
J
 
Joined
Jul 3, 2004
Messages
3,310
Location
Anchorage, AK
 
 
 
it's close, but it sits farther back a little bit. I don't have any dimensions, I think it is a thicker box too, so a little taller, I think.
 
Joined
Oct 22, 2007
Messages
1,570
Location
Enderby BC
 
 
Yes it seemed there was one version putting the two shifters in a row (100 series) vs side by side (70 series). Memory is hazy beyond that
 

BiffS

Too many projects... ooh, look. Something shiny.
Joined
Oct 2, 2005
Messages
525
Location
Vancouver, B.C>
 
 
I just did this exact swap.

1 HDT with H55 into a 77 series. Shifter fit in exactly the factory spot.

interesting and noteworthy:
- nose cone on 3B H55 will not fit. You need special 1HZ version

To retain 300mm flywheel (versus the 275mm HZ/ PZ):
- isuzu clutch disc is from 97 NPR diesel. There are other part numbers floating out there, but most dont exist currently or have been superceeded
- throw out bearing PN 31230-60130
- pilot bearing PN 90363-15017
- most HZ/ HDT/ PZ/ dust cover plates should fit.
- bell housing is OEM only, can't recall the part #
- you'll need a split case T-case to attach to the back of the tranny.
- you'll need a plug to cap off one bolt hole in the t-case which would otherwise put the bolt thru the 5th gear...
- will need the H55 transmission mount for the system, but there will need to be welding/ mods to the crossmember to make it fit. (cut here and there, weld on some brackets)
- will push the transfercase back a couple inches: you'll need to shorten the rear driveshaft.

Hope that helps.
 
Joined
Aug 3, 2005
Messages
2,176
Location
CAPE TOWN
 
 
 
I swapped a 1HD-T into my HZJ75 troopy and nothing moved



I wanted a 300 mm clutch and went the Isuzu route as described above. If your H55F is good, then keep it
 
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