Originally Posted by Irish07@VelocityAP

The recommendation of 75W110, is only if you experience driveline chatter. If you do not experience any type of chatter, then you are fine to stick with the OEM fluid of BOT 270a and/or an equivalent like Redline MT-LV.

Originally Posted by jaguardriver

My car is due, 2007 manual transaxle. I have the Redline MT-LV ready but am curious is the differential gears require a Hypoid spec fluid. I cannot find any mention of this fluid meeting this spec but then not sure it is needed. The same year range Jaguars (also owned by Ford at the time) required Hypoid spec fluid.

Originally Posted by shadowhusky

After some searching over the last few weeks I have been able to find the Castrol SYNTRAX 75w90 at O'Reilly Auto Parts. They didnt have it on the web site but my local store did carry it.

Here is a link from the Castrol site just to show what it looks like. it is the bottom picture.

http://www.castrol.com/castrol/secti...tentId=7081145

I will either get the Syntrax or the Royal Purple because I will not pay the $110.00 per qt. that the dealer wants.

Originally Posted by Irish07@VelocityAP

You’re over thinking this one. The Jaguar of same Ford era had a transmission, and a differential. They had 2 separate units requiring 2 separate fluid types. The VH V8V has a transaxle, which is a transmission and axle sharing the same assembly, and same fluid.
The Redline MT-LV is made specifically for the Graziano Transaxles found in Audi, Lamborghini, Aston Martin..etc.

Originally Posted by Barch92

Does the Redline MT-LV 70W75 require the Kendall Limited slip additive?

Originally Posted by Irish07@VelocityAP

I've been having numerous pms and emails about gear oils. If you've searched, there's a large amount of information that is correct and wrong.

So main questions.. "I have a V8V (ASM or Manual same thing), what gear oil do I replace it with"

From the factory, back 2006 the gear box was being filled with Shell 75W90, under testing in cold climates at -25C, the gear boxes were stiff shifting.

To correc the stiff shifting , SB0236 was released and BOT 270A was of the SB to replace the gear fluid. Castrol BOT 270A was used for it's a 70W, lighter fluid for colder weather. The Castrol BOT 270A is now ONLY available from your Aston Martin Dealer..(unless sourced from places like eBay).

The AM GT4 team suggests Castrol BOT 270A or Shell SAE 75W-90. In my area, Shell 75W-90 is hard to find in bulk for a dealer. being we have a Contract with Castrol, are reps advised us the best similar fluid to Castrol 270A and Shell 75W-90 is Castrol SynTec/SynGear 75W90 in Canada, in the USA this SynTec /SynGear is known as Castrol SynTrax 75W90. We have used the SynTec gear fluid in V8V's with no problem other than stiff when cold. This SynTec fluid is a choice we give to the client to reduce the service cost. If the vehicle is never going to be driven on cold morning/nights/fall/spring(below +10C), the client will usually favor in the SynTec..But price isn't a concern and the client doesn't want to deal with any hassle of stiff shifts, BOT 270A which is the correct fluid is used.

"I have a ASM vehicle, so I am not concerned about stiff shifting" ..True, but a missed shift can cost you $17,000-25,000. The ASM was been built and calibrated with 70W fluid in mind..if the fluid is thick/heavey and cold, a miss shift can happen..the ASM can't adapt for the possible stiff fluid like we can in person, after 3 attempts(strong forced hydraulic attempts) the ASM gives up and flags a fault..and now your stuck at the side of the road cycling the key to get the car moving again, only to realise you now have a bent synchro or linkage or ASM shifter unit...aka $$$$$$$$$

What I have found out from members on the board, the Castrol SynTec/SynTrax is not available over the counter..only sold to dealers via Castrol and possible available to the public if overed in bulk(5 Gallon bucket).

There is a Kendall additive available from A.M, this can also be sourced online. It has come to my attention that it is NOT REQUIRED FOR V8V, you can add it if you wish to use a 75W90 gear oil(don't apply to BOT 270A)..but is not required. It is however required if you change the diff fluid in a Automatic DB9 and decide to use a 75W90 gear fluid WITHOUT a LSD additive already mixed in. I have said in the past to use the Kendall additive in V8V's, if you have applied the additive..no worries, no damage, you can sleep at night..if you ever change the fluid again, it's really just a waste to apply for it's been noticed not to make any difference in V8V.


The gear fluid is replaced every 4 years or 64,000km(which ever comes first). So which fluid you decide really depends on you:
1: Do you mind the high cost in fluid, if this is not a question, put the BOT 270A
2:If the BOT 270A is hard for you to get, weither it be due to cost or area, you can use a 75W90 grade oil, but this is entirely your choice. You can try to source the SynTec/SynTrax, but it's all your choice again, if you drive the vehicle in cold and something does get damaged..you made the coice
3:People have used Royal Purple 75W90, the original Shell 75W90, Castrol 75W90..etc ..and have all had no problems. The gearbox in V8V's is used in Lambo's, Ferarri's..etc. They all don't use BOT 270A from Aston Martin. Aston Martin just had a concern to deal with(cold climate shifting), part of this was solved by using Castrol BOT 270A..you could always try sourcing the fluid from Ferarri or Lambo and input your results..I don't have any further input from that point of view


If I notice any faults in information, or if something you think I should add/edit to this information, let me know and I will edit my post.

Here is a picture of BOT 270A from Castrol so you know what your looking for, or trying to match:




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Added...

Manual GearBox Fluid for V8 and V12 Vantage, DB9, DBS: Castrol BOT270A

ASM Transmission for V8 Vantage, Vantage S, One-77: Castrol BOT270A

Automatic Gearbox Fluid for DB9, DBS, Rapide, Virage: Shell ATF M-1375.4 (this is Aston Martin 's fluid name for a ZF transmission fluid, other brands are avail from Land Rover/Jaguar that will work if the Shell is not found locally, mainly dealer supplied fluids)

Originally Posted by weiht

Hi, I can only find Motul 300 or Motul 300 LS locally and it seems like they are GL5 instead of GL4. Is there any long term issue with going with the GL5? I note that the original Shell oil AM recommended was GL5 but the Castrol BOT 270A is GL4.