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Main : Mechanical : Drive Train Nismo F5C56A vs Late ute 56A gearbox 1of3

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Nismo F5C56A vs Late ute 56A gearbox 1of3
Nismo F5C56A vs Late ute 56A gearbox 1of3Popular
Submittera12gruntMore Photos from a12grunt   Last Update2016/5/27 13:12    Tell a friendTell a friend
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Nismo F5C56A vs Late ute 56A gearbox

PS: The F5C56A is a dogleg 5 speed so first gear is behind the case together with reverse.

so according to tech wiki, late ute gearbox can handle an a14 but the nismo gearbox is marginal behind an a12?hehehe I've come to learn there's many a myths.

Nismo f5c56a has larger and wider gears than late ute gearbox and was designed specifically for motorsport race cars.

Here are my observations,
Just to give an idea incase the pictures aren't too clear,
for example,
Nismos' F5C56A  3rd gear on mainshaft is larger and wider than 2nd gear on Late ute gearbox. Compare its 3rd gear to the utes gearbox 3rd gear and its even a bigger size difference.
Simply compare gear to gear and should see the size and width difference.

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The comments are owned by the poster. We aren't responsible for their content.

Poster Thread
b310gx
Posted: 2016/6/2 8:43  Updated: 2016/6/2 8:43
No life (a.k.a. DattoMaster)
Joined: 2002/7/19
From: sydney australia
Posts: 1858
 Re: Nismo F5C56A vs Late ute 56A gearbox 1of3
I used a F5C56A behind a 100 HP A14 for years (1987-1989) with no problems, it was definitely strong enough. I used to do Off-street Drag Racing, with 245/535-13 rear slicks with a soft compound retread. What broke the gearbox was the front roller bearing on the cluster gear wore & eventually locked up, stripping the teeth off the input shaft, the cluster shaft & the 3rd gear, because that was what gear it was in. In my ignorance, the noise I heard was dismissed by 2 other 'experts' as a noisy throwout bearing. I was smoking a Valiant Charger (318/Auto) at the time, & still managed to coast across the finish ahead of him. That was why I never hesitated using the F5C56A box in my hillclimb 1000 coupe & as soon as I started hearing the noise, pulled it out for new bearings. The problem appears to be that the bearing only gets 'splash' lubrication.

Poster Thread
ddgonzal
Posted: 2016/5/28 0:27  Updated: 2016/5/28 0:31
Moderator
Joined: 2001/5/3
From: 48 North
Posts: 31575
 Re: Nismo F5C56A vs Late ute 56A gearbox 1of3
Quote:
according to tech wiki ... the nismo gearbox is marginal behind an a12?
Does it say that? I found this
Quote:
... are marginally OK for use with A13, although the TS racers had to treat them with great care.
...
The Option 1 five speed was the recomended transmission behind these factory spec race engines. Source. Datsun B110 Competition Tune Up Manual, 1974

Poster Thread
a12grunt
Posted: 2016/5/28 3:19  Updated: 2016/5/28 3:19
Home away from home
Joined: 2011/4/15
From: Melbourne
Posts: 671
 Re: Nismo F5C56A vs Late ute 56A gearbox 1of3
Sorry,that was my assumption as It says A13 then mentions TS racers.
Ts cup datsun 1200s used A12 bored out to 1300cc.
A bored out a12 to 1300cc is still an a12.

So which A13 is tech wiki referring to?
Stock american and asian market 75hp A13 or Ts cup a12s bored out to 1300cc?

Quote:
Nissan produced two different A13 engines: the 1974-only tall block A13 for the North America market, and the circa 1980-1982 A13 for asian markets. Additionally, bore-out A12s were used in racing in the 1300cc class and typically called A13 although they were in fact an A12 engine.

Poster Thread
ddgonzal
Posted: 2016/5/28 8:11  Updated: 2016/5/28 8:11
Moderator
Joined: 2001/5/3
From: 48 North
Posts: 31575
 Re: Nismo F5C56A vs Late ute 56A gearbox 1of3
Presumably it's referring to both (A12 bored out to ~1300 cc, and late A13 slightly bore out to ~1300 cc). Maybe it should be reworded as "1300-class A-engines"

Quote:
New A13

Aside from powering Datsun cars, this engine was used as the base for TS Cup racing and a number of Formula Pacific & Formula 3 race engines