The ‘lux diffs are 6x139.7mm pcd.Errol62 wrote: Sun Aug 10, 2025 10:18 pm Solid choice of rear axle there. What ratio? Are they originally 4.5” &*#@ pattern?
FB ute fixer upper, EK van on rotisserie
Cheers,
Harv
Family Affair Ek Ute
Re: Family Affair Ek Ute
Cheers,
Harv
327 Chev EK wagon, original EK ute for Number 1 Daughter, an FB sedan meth monster project and a BB/MD grey motored FED.
Re: Family Affair Ek Ute
that's for a fourby Harv, the 2WD diffs are 5x4.5"
I started with nothing and still have most of it left.
Foundation member #61 of FB/EK Holden club of W.A.
Foundation member #61 of FB/EK Holden club of W.A.
Re: Family Affair Ek Ute
Like the bloke with the artificial leg, I stand corrected
Cheers,
Harv
327 Chev EK wagon, original EK ute for Number 1 Daughter, an FB sedan meth monster project and a BB/MD grey motored FED.
Re: Family Affair Ek Ute
badoom tish ........ 
I started with nothing and still have most of it left.
Foundation member #61 of FB/EK Holden club of W.A.
Foundation member #61 of FB/EK Holden club of W.A.
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Sneezy1211
- Posts: 85
- Joined: Sun Jan 28, 2024 9:57 pm
- State: QLD
Re: Family Affair Ek Ute
Hi mateErrol62 wrote:Solid choice of rear axle there. What ratio? Are they originally 4.5” &*#@ pattern?
FB ute fixer upper, EK van on rotisserie
Gear set is 3.7:1 , had the Axel's re patterned to early holden as well
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Re: Family Affair Ek Ute
That is a very short ratio diff. Any idea what the overdrive ratio is in the box you have? Sorry about all the questions. Just thinking about how many revs you’ll be doing at the speed limit. 25 inch tyre height and 0.9:1 overdrive would be around 4500rpm. You could go up to around 27.5” tyre with 0.8:1 overdrive and get 3600rpm at 100kmh.
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getting my FB ute on the road
EK van on rotisserie
EK van on rotisserie
Re: Family Affair Ek Ute
It’s taller than factory FB/EK (3.89:1), or am I missing something? It’s very tall for a Toyota G diff (3.2 to 7.6:1).
Cheers,
Harv
327 Chev EK wagon, original EK ute for Number 1 Daughter, an FB sedan meth monster project and a BB/MD grey motored FED.
Family Affair Ek Ute
Yeah sorry, that figure is for 100mph. Using the Tremec app Harv. Stock 6.4R13 tyre is 25.27”. 3.89:1 diff the old grey is going 3216 rpm at 62.15 mph. With the 3.7 and 10% overdrive it is more like 2800 rpm. Bit more than my ute with the 3.08:1 in top at 2500rpm. My bad.
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Sent from my iPhone using Tapatalk
getting my FB ute on the road
EK van on rotisserie
EK van on rotisserie
-
Sneezy1211
- Posts: 85
- Joined: Sun Jan 28, 2024 9:57 pm
- State: QLD
Re: Family Affair Ek Ute
Hi ErrolErrol62 wrote:That is a very short ratio diff. Any idea what the overdrive ratio is in the box you have? Sorry about all the questions. Just thinking about how many revs you’ll be doing at the speed limit. 25 inch tyre height and 0.9:1 overdrive would be around 4500rpm. You could go up to around 27.5” tyre with 0.8:1 overdrive and get 3600rpm at 100kmh.
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Not sure mate box is a celica steel case 5 speed , will be running 15" wheels haven't got tyres as yet. The centre is a new true track and the gear set is new as well
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