↓ Advertise on Defender2 ↓

Home > V8 > V8 Conversion - Front & Rear Prop Shaft Length/Swapping
Post Reply  Down to end
Page 1 of 1
Print this entire topic · 
trickster5000



Member Since: 12 Dec 2015
Location: East Yorkshire
Posts: 471

United Kingdom 1989 Defender 90 300 Tdi CSW Arles Blue
V8 Conversion - Front & Rear Prop Shaft Length/Swapping
Hi,

I'm currently doing a V8 conversion on my 90 with a new galv V8 chassis and Def V8 R380.

Previously the transfer box was mounted on the 4cyl/200tdi brackets, standalone from the gearbox crossmember. Now the V8 drivetrain is fitted using the 300tdi/Td5 gearbox mounts (integrated into the crossmember), the gbox & tbox sit roughly 2" further forward than they used to with the 4cyl/200tdi mounts.

I know this means I'll need to change the gearbox tunnel but what does it mean for prop shafts? The front prop is now too long but I've measured them up and to me it looks like I could swap the front prop shaft with the rear (the 2" I've lost at the front is gained at the rear by the tbox moving forwards)?

It looks to me like it would work and save buying any different ones, has anyone done this before or know of any reason this wouldn't work?

Cheers, Matt.

'89 90 CSW with a 3.5 V8 conversion (WIP) - http://www.defender2.net/forum/topic46809.html
Post #953674 26th May 2022 12:00pm
View user's profile Send private message View poster's gallery Reply with quote
Linds Hanson



Member Since: 16 Jan 2021
Location: Cornwall
Posts: 297

United Kingdom 
Obviously 90/110 TD5/TDI, RRC or Disco 1 front props will all fit, TD5/300TDI 90 rear prop. The front props should run out of phase to alleviate the flange inclination difference between front diff and transfer box flanges.
Post #953685 26th May 2022 1:01pm
View user's profile Send private message View poster's gallery Reply with quote
Lodelaner



Member Since: 04 Feb 2010
Location: Lambourn
Posts: 573

United Kingdom 1988 Defender 90 V8 Petrol ST Shire Blue
I wondered about the same when I went from LT77 200tdi to V8 R380 as well! From memory the rear prop is about 9cm longer (61cm vs 70cm closed lengths).

You'll need to modify the seat box by the handbrake to accommodate the transfer box.

I took a complete Disco 1 V8 as a donor using the engine, gearbox, mounts, exhaust Y piece etc etc etc off it. Saved a bag of pain and cash. JB

@Lodelaner Instagram

Youtube greenlaning and other LR related content
Post #953696 26th May 2022 3:59pm
View user's profile Send private message View poster's gallery Reply with quote
mikeh501



Member Since: 07 Jan 2013
Location: United Kingdom
Posts: 1137

United Kingdom 
I’m just about to ditch my r380 for an auto. Just don’t get on with behind the v8. Worth a thought…
Post #953738 26th May 2022 9:41pm
View user's profile Send private message View poster's gallery Reply with quote
trickster5000



Member Since: 12 Dec 2015
Location: East Yorkshire
Posts: 471

United Kingdom 1989 Defender 90 300 Tdi CSW Arles Blue
Lodelaner wrote:
I wondered about the same when I went from LT77 200tdi to V8 R380 as well! From memory the rear prop is about 9cm longer (61cm vs 70cm closed lengths).

You'll need to modify the seat box by the handbrake to accommodate the transfer box.

I took a complete Disco 1 V8 as a donor using the engine, gearbox, mounts, exhaust Y piece etc etc etc off it. Saved a bag of pain and cash.

Thanks, currently looking through exhaust options - your 90 is very much the inspiration for the V8 swap and eventually soft top conversion! Thumbs Up

I've done a fair bit of measuring now and I don't think it's going to work - plus I need new UJs which is about £30 per prop and I can get the entire prop with UJs off Paddocks for roughly £80 each.

I think the parts I need are:
FRC8386 - front
FRC8393 - rear

mikeh501 wrote:
I’m just about to ditch my r380 for an auto. Just don’t get on with behind the v8. Worth a thought…

Cheers but I've just sunk a lot of pennies into a new R380 with Ashcroft, won't be doing too many miles and I like the idea of an old V8 and manual box Thumbs Up Matt.

'89 90 CSW with a 3.5 V8 conversion (WIP) - http://www.defender2.net/forum/topic46809.html
Post #953740 26th May 2022 9:49pm
View user's profile Send private message View poster's gallery Post Reply
Post Reply  Back to top
Page 1 of 1
All times are GMT + 1 Hour

Jump to  
Previous Topic | Next Topic >
Posting Rules
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum



Site Copyright © 2006-2023 Futuranet Ltd & Martin Lewis
DEFENDER2.NET RSS Feed - All Forums