H151F / HF1A For Dummy (1 Viewer)

[Delancy]

H151F

1. In prudence, if one were to want to rebuild a used unit, where best to order the OE "kit"?

"Kit" used as I have no clue what components should be replaced, nor will have the time/wherewithal to inspect and order accordingly, considering all non-US.

I'm sure someone in the know could formulate a "list" from the following. I do not fall into that category.

http://www.sugarlump.no/cruiser/HDJ-80_2.pdf

http://www.sugarlump.no/cruiser/HDJ-80_S2.pdf

2. Have read it best to upgrade to an 80 Series clutch, flywheel.

What's necessary to do so, if the donor H151F was removed from a 1997 FZJ75?

3. Are any R15X interval interchangeable?

Posed to determine if feasible for Marlin, or similar, to rebuild with consumable parts on hand, ie shims.

4. Can the H150F first gear be swapped into the H151F?

5. Is there any added benefit in cooling or feasible to integrate?

HF1A (non-electric)

1. In prudence, if one were to want to rebuild a used unit, where best to source a kit?

2. Why are Marks crawler gears unavailable for the HF1A?

3. Any other know options for a lower low gearset?

 

[rick_d]

chris-
no R series parts fit, different system.
to use the low first gear the counter shaft gear set would also have to be fitted $$$$
no lower gear sets for t case primarily because the idler gear is unique- it does not use a idler shaft- that is integrated into the gear
(heavy sob)

 

[Delancy]

chris-
no R series parts fit, different system.

I didn't figure....

Odds of any shop having consumable parts here are slim to none, too, I suppose.

to use the low first gear the counter shaft gear set would also have to be fitted $$$$

I think, being operative, the lower second negates benefit of.

no lower gear sets for t case primarily because the idler gear is unique- it does not use a idler shaft- that is integrated into the gear
(heavy sob)

Hmmm....

Guess some time spent with ratios compared to butt dyno with the previous A343F/HF2A/5.29s/37s is necessary then.

Doesn't change interest in H151F/HF1A, for obvious reasons, but a numerical comparison may give insight into how low, low is gonna be, since a major concern.

Emailed screen shot of "kits", the only I've found, but for posterity.

Only to Australian businesses, in Australia, verified with whatever licensing they're issued, to which I've access.

Based on VIN, mileage, and source discussed, stated there was no reason to be concerned with.

If it were that easy to silence the voices, then there'd be no Antonson, Azeri, & Busey psychiatric clinic, for other's to benefit from.

 

[Delancy]

Hmmmm......

Using

http://www.4lo.com/calc/gearratio.php

And

A343F (FZJ80)
1st 2.804:1
2nd 1.531:1
3rd 1.000:1
OD .753:1

H151F (FZJ80)
1st 4.081:1
2nd 2.294:1
3rd 1.491:1
4th 1:1
5th .881:1

HF2A (FZJ80)
H 1:1
L 2.488:1

HF1A (FZJ80)
2H 1:1
4H 1:1
4L 2.488:1

Mark's HF2A (FZJ80)
4L 3:116:1

Diff Gears
5:29:1

Tires
37s

So, in my FZJ80:

HF2A 4H 1:1
Mark's 3:116:1 L
A343F 1st 2.804:1
Diffs 5.29:1
37s

Final ratio 4H
1st-14.83:1
2nd-8.09:1
3rd-5.29:1
OD-3.98:1

Crawl ratio: 46.22:1

Would run 2,900 RPMs at 75mph
Calculated RPMs at 75mph 2,713

Same calculator:

HF1A H 1:1
HF1A L 2.488:1
H151F 4.081:1
Diffs 5.29:1
37s

Final Ratio 2/4H
1st-21.59:1
2nd-12.14:1
3rd-7.89:1
4th-5.29:1
5th-4.7:1

Crawl ratio: 54.06:1

Calculated RPMs at 75mph 3,174.20

Think I'm cool with the H151F/HF1A gears, since marginally lower than what the 80 was.

Mebbe need 39s to balance it out, even.

 

[rick_d]

a image of the idler gear, tapered bearings sit on outside edges- i chipped two teeth
getting an old bearing off and this heavy sob gear. They are $375 from amayama plus the ride.
lesson learned, don't break these (you need a good level bearing splitter not a poorly machined
one that deflects when it cranks down).

 

[Delancy]

If regearing diffs, any suggestions?

Loved 5.29s in the 80, but may have been a little much with 37s.

 

[Tapage]

Chris .. pics I send to you today of heavy ass 80 .. well those are 38.5" TSL with 5.29 stock gearing in both t-case ( full manual part time HF1A ) and tranny H151 .. that 80 has a 1FZ-FE superchaged ..

 

[Delancy]

Y'all love mud, eh?

Bahaha.

In my 80, I think 39s would've returned to nearly OE ratios, which would've only mattered at speed.

Really trying to utilize bits from the departed 80, but the wheels aren't making sense, due to offset, and 39s are sounding better, if it'd afford 1" less lift, remain stable, and reduce RPMs at highway speed.

 

[Delancy]

no lower gear sets for t case primarily because the idler gear is unique- it does not use a idler shaft- that is integrated into the gear
(heavy sob)

@rick_d

Listen, we've established my qualifications, anticipate my stoopid questions, but, at least, it ain't about knuckles, eh?

Prepare for the dumb question...(flame suit on)

Could the idler shaft from an HF1A be transplanted in the HF2A?

What prompted the thought is the early RF1A appear to have had a similar one piece assembly, yet Marlin cut lower gears sets that appear to have a separated assembly.