Mark Pascoe

Thanks for identifying the pins Shodog. So if I’ve got this right, they are in fact from an MIP trailing arm suspension kit and not for use with the stock A-arms at all! I’ve got no plans to try and source a trailing arm set up so would be interested in a trade if you are. I will check this weekend as I’m sure there were 4 of these. Thanks for the input on the shimmed arms too, that makes sense, I know about the CRP rear A-arm bushing kit (1540) but this is obviously something else altogether.

Thanks Darryn. This is the only shot I have before I stripped it down. You can just see the pins holding the A-arm on. The gearbox has been modified and had part of a Thorp/MIP ball diff fitted. (see my other post) Box and arms are both Mk1.

Another mystery I’m trying to solve folks. These rear arms were attached to a modified SRB gearbox in my stash with the pins in photo 2. They appear to have been sleeved with a brass like material and the pins are an unusual design (only had 3 fitted) Any input would be greatly appreciated.

I’ve managed to pick up some NIP Thorp ball diff parts which has allowed me to compare them to these parts. The 2 axles are definitely Thorp right hand axles, part# 4445, but the pressure disc is not a Thorp one and as it fits the aluminium gear perfectly I’m assuming it’s a MIP ball diff one? So a bit more of the puzzle solved. Next decision is do I sell/trade the MIP parts or try and find the missing parts to complete the diff, I suspect option 2 could be a challenge!

Thanks Shodog. That’s a nice piece of kit there, I’ve seen some of the stuff you have collected, very nice. I agree about the aluminium gear being MIP but looking at the axles they don’t have the 3 tapped holes like the MPI ones. Can I ask you, do both your MPI axles/outdrives have tapped holes, either internally or externally? My axles have no holes. I’m still leaning towards them being 2 right hand Thorp axles. As for the pressure disc, not sure. The black plastic/nylon counter shaft gear is another mystery! and as for the “input” shaft/gear (last 2 pieces in the far right in the photo) god knows what they were thinking, I don’t know what it’s from but it wouldn’t work in a million years!

Thanks for the info. I’ve had a bit more of a dig around and I don’t think it’s a Nodis gear, that diff is quite a different design. Don’t know if you’ve seen this but some good Nodis info here: https://www.tamiyaclub.com/article.asp?id=186 I think it’s more likely to be a MPI gear. Again some good info here on tha MPI diff if you haven’t already seen it: https://www.tamiyaclub.com/showroom_model.asp?cid=43754&id=5475 I still think the axles and pressure disc are Thorp however. Photo of a MPI diff gear for reference (not mine).

Thank you, looking at the parts list I may have a pressure disc, part# 4442 and 2 right hand axles, part# 4445. Possibly.

Hi folks I stripped down a SRB gearbox today that I’ve had sitting in my parts box for years. Inside it were these parts from a ball diff. Can anybody help me identify what they are? I have no idea what the aluminium gear is from but I think the 2 axles and pressure disc may be Thorp items from the SRB ball diff (4435) but I can’t be sure. Any advice would be greatly appreciated .

That would be great if you could, you can’t get enough photos of SRB stuff!

Thanks I’ll get in touch.

Hi Cooltoys I checked out your SRB stuff, very nice!

Thanks I’ll look him up.

Thanks for the recommendation I’ll look into it. I’m not in a huge rush.