Got my D2a's auto reconditioned and now it drives really sluggish. What's going on?
	
	
		So I have a 2004 Discovery 2a with the automatic ZF 4HP22EH transmission. When I bought it, the transmission had been replaced by the previous owner.
A year and 30000km since my purchase, the transmission died after a few days of very delayed engaging of "Drive" on start up, very harsh clunking when changing from 1st to 2nd and back (hard enough that it felt like I was getting rear-ended).
Anyways, the transmission died and three weeks since handing it into the auto workshop, I got it back yesterday and it's reaaaaaally sluggish.
Going up a hill at 60km/h, it struggled to keep the pace and dropped down to 35km/h while the revs hit 3000.
So what I wanna know is what the hell is going on? It was driving fine before the transmission died so what could've changed with the engine in three weeks of not being driven?
Is there anyone who has any idea as to what could be going on?