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harro
19th February 2018, 06:14 PM
I have recently installed a reconditioned lt230 from Ashcroft into my 03 defender.
The one I removed was a suffix G with a 26 tooth input gear. 1.4 ratio

The one I installed was also a suffix G with a 28 tooth input gear. Ratio 1.2
I intended to fit my Roamerdrive overdrive onto the new 1.2 ratio t/case with the intention of towing our camper in 4th overdrive.

However the overdrive input gear is 26 tooth as per the previous t/ case.This wasn,t going to be an issue as Roamerdrive make an input gear for the suffix G t/case.

My problem is the suffix G 1.2 ratio T/case should have a 38 tooth input gear not 28 and Roamerdrive no longer make a 28 tooth input gear only the 38 for the 1.2 t/case.
So how did a suffix G t/case get a 28 tooth input gear.

I nave emailed Ashcroft with my query but would appreciate any comments.
Am I missing something?
Everything I have read says a Suffix G t/case should have a 38 tooth input gear[bigsad]
Vern
19th February 2018, 08:15 PM
You have just gone from a 1.4 tcase to a 1.2, why do you need the overdrive?
harro
19th February 2018, 08:42 PM
You have just gone from a 1.4 tcase to a 1.2, why do you need the overdrive?

I tow the camper (1.5 t) in 4th gear, even with the 1.2 t/case at 100km/h = 2,800 rpm.
with the 1.2 t/case and overdrive about 2,200.

with the VNT and various other mods 2,200 rpm is pretty ideal.

Paul.
Vern
19th February 2018, 09:08 PM
Defender Guide :

Suffix A or B uses a FRC5428, not*cross drilled *(26 teeth, 27mm wide)

Suffix C to F uses a FTC5089, cross drilled (26 teeth, 32.7mm wide)

Suffix G, 300 TDi or TD5 uses a FTC4962 cross drilled (26 teeth, 32.56mm wide)

Suffix G, *TDCi uses a FTC4850 *cross drilled (38 teeth)
harro
20th February 2018, 09:17 PM
Defender Guide :

Suffix A or B uses a FRC5428, not*cross drilled *(26 teeth, 27mm wide)

Suffix C to F uses a FTC5089, cross drilled (26 teeth, 32.7mm wide)

Suffix G, 300 TDi or TD5 uses a FTC4962 cross drilled (26 teeth, 32.56mm wide)

Suffix G, *TDCi uses a FTC4850 *cross drilled (38 teeth)


Yes I am aware of this guide.
suffix G for the 300tdi and td5 is for the 1.4 ratio t/ case. 26 tooth.
suffix G for the TDCI Defender is also the late d2 Disco t/case and is 1.2 ratio. 38 tooth.

I now have a 1.2 ratio suffix G t/case with a 28 tooth input gear.
Factory never made them that way.....